After
Abdul Hamid II ascended the throne in 1876, she was given the position of
Valide Sultan, title due to the mother of the Sultan, by him, and headed the harem. Perestu was the first woman to have this title without being the Sultan's biological mother, and the last woman in history to bear it, since both
Mehmed V and
Mehmed VI, the last two Ottoman Sultans, were orphans on their ascent to the throne. Abdul Hamid told her categorically not to involve herself in politics. Thus, unlike many of her predecessors, she was not active in politics, because, although he valued his adoptive mother, he believed that the excessive interference of the previous Valide Sultans in politics had damaged the Empire. In 1879 she interceded with Abdul Hamid on behalf of his half-sister
Mediha Sultan and her adoptive mother
Verdicenan Kadın. Mediha Sultan wanted to marry the man she was in love with instead of accepting an arranged marriage, and she sought the help of the Valide Sultan in presenting her request to the Sultan. Abdul Hamid accepted the request. Three days before Abdul Hamid became Sultan, he went to Perestu's villa and kissed her hand, acknowledging her as his Valide Sultan, and it was from there that he proceeded to
Topkapı Palace for the ceremony of homage at his accession. Perestu loved this house. Now and again she would want to go there, but because Abdul Hamid absolutely wanted her present in the palace he would withhold permission. In 1885, during the visit of King
Oscar II and
Queen Sophia of Sweden and Norway to the
Ottoman Empire, she received the Swedish and Norwegian Queen, who was allowed to visit the Imperial harem. The internal matters of the palace were in her charge. But she did not want to hurt anyone's feelings in the least, did not interfere in the matters, sought justice and equity, and because she was firmly religious she passed a good deal of time in prayers. She possessed good, high moral standards, which led her to help the poor and needy. Abdul Hamid particularly wanted Perestu to attend the Royal Mosque Procession every Friday. Sometimes after the ceremony she would secretly slip out to her villa, but when Abdul Hamid learned of it, he immediately aided set off from the palace with a carriage and brought her back. In 1891, Perestu commissioned a fountain (sebil) in Bala Tekkesi, Silivrikapı and another fountain (çeşme) in the same place in 1895. ==Death==