2 main theories:
1) infertility (either gotou or husband) -> nuclear family dream shattered -> fight -> need to freeload coz ain't got no money -> hey this lesbian who crushed on me should be safe right
2) infertility made Gotou realise tradwife is not the path she wants anymore -> yolo -> gae
i do wonder why does the author loves to write garbage humans and NTR so much
Oh, she was DEFINITELY burned by some garbage women in the past. Hates herself for liking them too. Of course liking fucked-up women so much, you start wondering if you're the problem