According to Ivinskaya, Zinaida Pasternak was infuriated by her husband's infidelity. Once, when his younger son Leonid fell seriously ill, Zinaida extracted a promise from her husband, as they stood by the boy's sickbed, that he would end his affair with Ivinskaya. Pasternak asked Luisa Popova, a mutual friend, to tell Ivinskaya about his promise. Popova told him that he must do it himself. Soon after, Ivinskaya happened to be ill at Popova's apartment, when suddenly Zinaida Pasternak arrived and confronted her.