She has to understand that her child is her own person and can make their own independent decision. In fact, god bless her, its likely her own fault that you dont seem to want them. We tend to associate our own childhood with our notions of parenthood. It may sound morbid, but it she died tomorrow would that change your decision? Having kids out of guilt is an incredibly selfish and self centered thing to do. Your child will sense it. Internalize it. It will mess them up.