My ex wife was cheating

My ex wife start coming home late a lot. Said she was working late. But when would have sex, her pussy had obviously been recently used. It would feel hollow and sticky/slimy, and a few times while eating her out, there was small amounts of cum inside her. She denied it up until she got pregnant by him. I offered to raise it and let her keep cheating. But I guess the thrill of me knowing was over so she moved in with him and we divorced.