I mean, what kind of soulless husk of flesh sells out their child for that

"A mother's love" is a narrative used to hide the fact that women are the overwhelming abusers and killers of children, and they can and often do things so unfathomable to those kids that it would make you ill.

Especially for their "new boyfriends." Stepdads get a bad stereotype for what they do to kids, but that's only because they get all the blame pushed on to them because the Mom's get fully immunity (and memory holing victimhood) to testify against them. Despite the fact they usually either knew about or actively helped the horrors happen.

Also considering how hard it is to even get a woman trialed and thrown in jail for anything, the ones who do manage are probably also a large amount of baby killers. She will be far more among normal company compared to a men's prison.