While she was in Berlin she had a daughter she named Constance Alexandra. She gave the child up for adoption to a Russian couple. She eventually married a Belgian man to enable her to get out of Germany. On her return to Ireland Mitchell lived in a house owned by the family in
Rossnowlagh in
Donegal, which she knew from childhood holidays. She spent the rest of her life living there, supposedly sleeping in the bathroom, almost a complete recluse. She never attempted to find her daughter but left her money in her will. She died on 23 November 1995. She is buried in Glasnevin Cemetery in Dublin. ==In other media==