Zhai Chenguang was very much aware of Liu Hui Ying's hate of men and especially towards her nephew if she was to bring Zhai Tianyu then Liu Hui Ying who have agreed to help her might just go on and refuse. In the end, she couldn't help but cry silently as she scolded her nephew for offering Liu Hui Ying a poisonous wine on their wedding night. That nephew of hers could have given Liu Hui Ying anything, like a baby or something of the sort but he just have to give her that poisonous wine.
No, but if her nephew had tried to give Liu Hui Ying a baby then he would have lost his ability to give a baby to anyone else.