Following the birth of their first child,
Thomas Forrester, Taylor Hayesmarried to Ridgebecomes pregnant with twins. Throughout the pregnancy, Taylor suffers with
tuberculosis, although she delivers the children without medication. Steffy and
Phoebe Forrester are born on September 21, 1999, as Taylor almost dies. Steffy is named after her paternal grandmother,
Stephanie Forrester (
Susan Flannery). In February 2001, a family trip to
Saint Thomaswhere Ridge and Taylor renew their vowsends in devastation when two-year-old Steffy supposedly falls overboard during a storm and is presumed dead. However, Steffy has been kidnapped by Ridge's unstable ex-girlfriend
Morgan DeWitt (
Sarah Buxton)who was previously obsessed with having a child with him and Steffy is confined her to the walls of Morgan's home. Months after Steffy's supposed death, Taylor visits Morgan and discovers that Steffy is alive. Morgan then takes Taylor and Steffy hostage, but they are saved by Ridge. Morgan tries to flee but is arrested. The next year, Taylor is supposedly killed after being shot by another unstable resident,
Sheila Carter (
Kimberlin Brown), while trying to save Ridge's former love
Brooke Logan (
Katherine Kelly Lang) from being shot. Ridge marries Brooke months later and they raise the kids as a blended family. In 2005, Taylor returns, having been presumed dead after being shot by Sheila and returns to her marriage to Ridge. In 2006, Steffy leaves town for boarding school in England. In 2008, a graduated Steffy returns to Los Angeles and begins working for the family fashion house, Forrester Creations. She briefly dates
Marcus Walton (
Texas Battle), and discovers that he is the son of Brooke's sister,
Donna Logan (
Jennifer Gareis). Phoebe is killed in a car accident after the car she was driving with her boyfriend Rick swerves off the road. Steffy mourns the loss of Phoebe and begins a romance with Rick to feel closer to Phoebe. Her family are horrified and eventually break up the relationship. When businessman
Bill Spencer, Jr. (
Don Diamont) takes over Forrester Creations, Steffy attempts to seduce him, (who is married to
Katie Logan (
Heather Tom), (Brooke's sister) to win the company back for the Forresters in February 2010, ensuring that the Logan sisters have been excluded as owners. Steffy takes an interest in
Oliver (
Zack Conroy)who is dating Brooke's daughter,
Hope Logan (
Kimberly Matula), but Oliver rejects her. At a pool party, Brooke has sex with a masked Oliver who she thought was ridge and he believed Brooke was Hope. At Hope's graduation party, a tape, supposedly narrated by Steffy, appears to expose this scandal. After Ridge consequently fires Steffy from Forrester Creations, Taylor compensates by signing over her 25% shares to Steffy. However, it is soon revealed that Steffy's narration was manipulated by computer expert
Liam Spencer (
Scott Clifton), who is Bill's son. Steffy forgives Liam and later develops feelings for him, but he begins a romance with Hope who will not have sex with him until marriage. Steffy travels to Paris for an extended business trip. In 2011, Steffy returns from Paris and seeks a relationship with Bill. When Bill nearly drives
Amber Moore (
Adrienne Frantz) to her death at a cliff, Steffywho saves Amberkeeps this a secret. Katie demands Bill see a therapist (Taylor). He later has an emotional affair with Steffy and vows to leave Katie for her which ends when Katie has a heart attack after learning of it. Devastated by Bill's rejection, a distraught Steffy slips in her bathtub, nearly drowning herself, but she is saved by Liam, now Hope's fiancé. This reignites her feelings for him. While Hope neglects Liam emotionally during their wedding preparations, Steffy is constantly there for him. Hope watches Steffy and Liam kissing, and dumps him. Heartbroken, Liam instantly proposes to Steffy. Organized by Bill (who would rather have Steffy as his daughter-in-law), they travel to
Aspen, Colorado the next day later and marry, despite Hope trying to stop the wedding. Liam, however, cannot choose between Hope and Steffy, ultimately deciding to be with Hope after finding out that Bill had manipulated him into staying with Steffy. Liam files for divorce in 2012, but still in love with him, Steffy refuses to sign the papers. She eventually signs the papers, freeing Liam to marry Hope. However, Liam still has feelings for Steffy, prompting him to tear up the divorce papers and kiss her. Despite this, Liam and Steffy eventually divorce. Shortly thereafter, Liam believes Hope has left him on their wedding day in Italy. He declares his love for Steffy, but Hope soon tells him of the misunderstanding. Liam and Hope unofficially marry in Italy only to realize the marriage is invalid. Before Hope and Liam's official legal wedding in the United States, Steffy spends a night on the town with Liam. Hope finds out and leaves Liam. Steffy and Liam are reunited, and she soon finds she is pregnant in early 2013. However, she keeps it to herself when she sees Hope and Liam kissing. Liam finds out about the pregnancy and recommits himself to Steffy, but shortly after their wedding she who loses the baby in a motorbike accident. Steffy then learns that her accident has left her
infertile. Devastated, Steffy decides to divorce Liam and relocate to Paris. She returns to Los Angeles several months later for a brief visit, informing Liam that her infertility issues have been corrected, hoping that it could mean a second chance for them. Despite this, Liam insists that he is obligated to Hope, and Steffy leaves town again. After another short visit to Los Angeles in February 2015, Steffy returns months later to help Ridge take over Forrester Creations by overthrowing Rick. She becomes president of the company and rekindles her romance with Liam, ending his relationship with her cousin,
Ivy Forrester (
Ashleigh Brewer). Steffy's cousin,
Aly (Ashlyn Pearce), resents Steffy, attributed to the fact that Taylor had accidentally killed her mother,
Darla (
Schae Harrison), years ago in car accident. An unstable Aly attempts to kill Steffy on
PCH, resulting in Aly trying to kill Steffy with a tire iron. Ivy recorded a video of the accident on her phone, not seeing the rock Aly slipped and fell on. Ivy gets involved with
Wyatt Spencer (
Darin Brooks) and Ivy blackmails Steffy with the video, calling the accident a murder. Ivy decides to delete the video after Steffy tries to convince Wyatt to delete it. Thomas tells Steffy that he made out with Ivy while Wyatt was on a business trip. Steffy confronts Ivy and convinces her to tell Wyatt but tells Wyatt before Ivy has a chance. Wyatt breaks up with her, and Ivy is angry at Steffy and confronts her in front of a broken electrical panel, resulting in an altercation in which Ivy gets electrocuted. Ivy survives and files a restraining order against Steffy while Wyatt resumes his relationship with Ivy. Ivy realized she never got over Liam and convinces Liam to give them another chance if she drops the restraining order. Quinn overhears Ivy telling Liam she loves him and exposes this in front of Steffy and Liam while Wyatt is proposing to Ivy. Wyatt breaks up with Ivy and she packs her bags for Australia. On top of the staircase, Steffy confronts Ivy and she tumbles down. Liam is angry at Steffy and breaks up with her. Liam hits his head on the plane with Ivy, while Wyatt comforts Steffy. Liam disappears (he was really kidnapped by Quinn after having passed out due to concussion symptoms he acquired by hitting his head while on a plane and passing out in the parking lot of Forrester Creations and losing his memory as a result) and Wyatt tells her that Liam must have once again let her down. Wyatt shows her how to have fun by surfing on the beach and even buys her a motorcycle, which she hasn't driven since her miscarriage. The two fall in love and eventually get married on the beach. Steffy's marriage to Wyatt eventually breaks down due to their differing opinions about Quinn, and they separate while Steffy contemplates divorcing Wyatt. She eventually rekindles her love and relationship with Liam. Liam proposes to Steffy, and she accepts, and after Steffy's divorce from Wyatt was finalized, Steffy and Liam got married in Sydney, Australia. Their marriage is going well until Bill decides to burn down the Spectra building, to build a skyscraper in its place. Unbeknownst to Bill, Liam and his new friend Sally Spectra were still in the building. Liam and Sally shared a kiss thinking they were going to die. Steffy was empathetic towards Bill after everyone turned against him. Liam decided to be honest and told Steffy, upsetting her. Steffy left for the guest house, where Bill tried to comfort and seduce her. Steffy realized she's pregnant and a paternity test determined Liam as the father. Liam was thrilled to find out the news but confused by the need for the paternity test in her purse. Steffy confessed what happened and Liam was infuriated with both Bill and Steffy. He served her annulment papers but would be around for the baby. Steffy's arch rival Hope Logan (Annika Noelle) returned to L.A and confronted her about her affair with Bill. Hope helped Steffy to try to win Liam back by being a confidant to him and her. Throughout her pregnancy, Steffy tries to win Liam back and not have him divorce her. Also Steffy dealt with Bill meddling in her marriage. Hope and Steffy's rivalry ignited again when Hope started to fall in love with Liam again, and tried to get him to leave Steffy. Liam decided to give Steffy a second chance by sending her white roses and a note as a sign of forgiveness. However Liam divorces Steffy when Wyatt told him that Steffy and Bill were having an affair, unaware that Bill manipulated Wyatt into thinking Steffy betrayed Liam again. When Bill visited Steffy, he tried to convince her that they belonged together, but Steffy demanded Bill leave. After Steffy slammed the door on Bill, she fell and went into labor. Steffy gave birth to a girl whom she named after Liam's late mother. However, despite being the mother of his child and emotionally invested in him, she called off their engagement when she caught Hope and Liam kissing backstage at Forester, and almost married Bill when he asked her to marry him. Steffy realized her worth, and ultimately chose herself. Bill as a sign of good gesture, signed over his 12% of FC to Steffy. Afterwards Steffy returned to Forrester to announce that she was now a majority shareholder of FC. When Liam arrived at Forester's Steffy told him that she did not marry Bill, but she will not be with Liam because of Steffy realizing that Liam will never choose between her and Hope and she decided to focus on her daughter Kelly and work. She will not repeat the cycle that her mother did with Ridge and Brooke. Steffy gave Hope her blessing to marry Liam as she wants him to be happy and wants to set an example to Kelly. Steffy invites her mother, Taylor, to move in with her despite Hope's wishes for her to leave town after finding out she allegedly shot Bill Spencer. Steffy tries to convince Hope that Taylor would never hurt their daughters. Hope decides she doesn't want her baby to grow up with her sister Kelly if Taylor is part of the family. Steffy decides to adopt a baby so Kelly can have a sibling close in age just like she did before Phoebe died. Steffy unknowingly adopts Beth, after Dr. Buckingham switched her with a stillborn to pay off a gambling debt. Steffy names the baby girl Phoebe in honor of her sister. Steffy and Liam decide it would be good for Phoebe to grow up with Liam as a father figure. When Steffy's nephew Douglas visits, he tells her, Liam and Hope that Phoebe is Beth (Hope and Liam's daughter) and that he heard his dad, Thomas say that Beth was alive. Steffy and Hope thinks that Douglas is confused, but Liam would not let it go. Steffy tells Liam that Beth is gone and that her baby is Phoebe. After Steffy returns with Kelly from a doctors appointment, Liam and Hope break the news to her that Flo, who was the supposed birth mother confessed that Phoebe is Beth and that she is not the birth mother. Also they fill Steffy in on Dr Buckingham switching Beth with a stillborn baby, and that he sold Beth to Steffy because of his gambling debt. However Liam and Hope tells Steffy that Taylor was not involved in the illegal adoption, and that she wanted to give Steffy a daughter by paying Reese a lot of money. Unaware that Taylor gave Reese the money for his gambling debt. Liam reveals who knows about Beth being alive including Thomas. Steffy at first refuses to give up Beth because she had bonded with her and loves her, but after realizing that Beth is Hopes daughter (even though there is no proof) and that Hope never got the chance to be Beth's mother, Steffy gives Beth back to Hope. After Liam, Brooke, and Hope leave with Beth, Steffy collapses in Ridges arms crying over the loss of Phoebe. Shortly thereafter, Steffy hears that Thomas was in the hospital due to being pushed off the edge of her cliff house by Brooke. Steffy then confronts Thomas at the hospital. Steffy informs Thomas that she will never forgive him and he will never see Kelly, or her ever again. However, with the help from Ridge, Steffy slowly forgives Thomas. Liam and Brooke believes that Thomas is still obsessed with Hope even after giving her parental rights to Douglas. Liam then asks her to hire Zoe back to spy on Thomas. Steffy agrees but warns Zoe to not betray her and her family again. Zoe is hired again and is now dating Thomas. Steffy and Hope believes that Thomas has changed even with dating Zoe. Liam stays at Steffy's house after a fight with Hope over giving up her rights to Douglas. Thomas calls Steffy to kiss Liam to break up Liam and Hope, and tells her that he will call her when Hope arrives as a signal to see them kiss. Steffy kisses Liam and Hope is heartbroken when she sees them both kiss. Hope breaks up with Liam and kicks him out of the cabin. Liam stays at the cliff house with Steffy and Kelly. Steffy feels guilty and tries to tell Liam, but Thomas manipulates her to keep quit. Steffy keeps quiet until she sees Thomas's sketch for the showstopper gown for Hope for the future and realize that Liam and Brooke were right about Thomas all along. As well as finally learning that the gown was for Hope for her to marry him again for the sake of Douglas. Steffy confronts Thomas on using Zoe and Douglas to get to Hope. Steffy finally tells Liam and Hope the truth. All three make a plan to expose Thomas at his wedding with Zoe. When Thomas is about to marry Zoe, Hope stops him by wearing the showstopper gown. Thinking that his plan worked, Thomas picks Hope over Zoe, but his plan backfired when Hope tells him that she knows what he has been up to. Hope reveals to the family that Thomas has been using Zoe to get to her and manipulating Douglas into thinking that he would lose another mother if Thomas married Zoe. When Thomas tries to marry Zoe again, Zoe also informs him that Hope already told her before the wedding his plan to be with Hope again and refuses to marry him. Steffy tells Thomas that Hope and Liam knows about the staged kiss, as well as Hope knowing about the showstopper gown. The family and mostly Ridge are disappointed in Thomas because they believed him over Brooke and Liam. Thomas then pleads with Hope to be with him, but Hope refuses and rejects him. In July 2020, after a motorbike accident, Steffy lands at the hospital and meets her doctor, John Finnegan (
Tanner Novlan) and both experience an immediate attraction to each other and cultivate a love at first sight connection. Suffering from a back injury and fractured ribs, Steffy began taking pills for pain relief as prescribed by Finn. Finn visited Steffy, as he lived near Steffy's home, to drop off her missing paperwork. He asks Steffy that since he lived nearby if he could come see her to check on her recovery, Steffy promptly agrees and expresses how she would love that. During the visits, the two bond over past emotional trauma and pain. Steffy soon develops a heavy dependence on the pills and begins asking Finn for an extra prescription during one of his house visits. He accepts it once, before flat out refusing thereafter due to the addictive nature of opioids. Finn later decides to tell Steffy that, for ethical reasons, he will remove himself as her physician, as he has developed romantic feelings for her, and Steffy expresses that she shares those same romantic sentiments. The pair share a first kiss. Steffy soon experiences addiction to the pills and is found passed out on her couch at home. After an intervention set up, Finn agrees to place Steffy in a rehabilitation facility. Later, the pair pronounced their love for one another and begin an intimate relationship subsequent to her leave from the facility. Months later, Steffy finds herself pregnant after she had a drunken stupor led to a one-night stand with Liam, leaving her questioning her child's paternity. With her intuitive sentiment and strong desire for having Finn father the child, Steffy was later shattered to learn from Dr Campbell (
Tina Huang) that the result from the laboratory had listed Liam as the father. Finn tells Steffy that while he would like to stand by her, however, he does not know how he could fit in her life. Steffy pleads to Finn not to leave he as he is the man that she loves and wants to be with. Finn decides to stay and even attends Steffy's ultrasound appointments with her. Shortly thereafter, Finn and Thomas come to learn that Vinny Walker (Joe LoCicero) tampered with the test, and Finn is indeed the child's biological father. Finn reveals to Steffy the joyous news and proposes to Steffy, who accepts. With the assistance of a midwife, the pair welcome at home their son via
waterbirth and name him, Hayes Forrester Finnegan (Samantha Worden), as a homage to his maternal grandmother, Taylor Hayes. The duo later tie the knot at the Forrester mansion in an intimate ceremony, attended by close family and friends. == Reception ==