Hey, was this guy also going to bed with minors?
after that my partner cheated with a 16year old and a 15year old while I was carrying his daughter.
If I were you, I'd think of what this jerk will do when your daughter grows up..
You really need to work on your self-respect and your survival instinct. Those kids of yours' will not benefit from a father like that. He will likely continue his behaviour and probably will be caught by some husband or father someday. When the news gets out then, it's on all of your family.
Look to the future and clean house.
Sorry, girl, but the 'staying for the kids' is an OUTDATED excuse. There are children today with only one parent and they do just fine.