Musannaf Ibn Abi Shayba 9:324

Jarir narrated to us, from Mughira, from Ibrahim, that he was asked about al-Sha'bi, so he said: "They have claimed that a man bought a slave girl, and his wife feared that he would take her (as a concubine), so she ordered a son of hers, a young boy, to lie with her in order to make her unlawful for her husband."