Answer:
You blame the child when its really your fault. Then when you are in your forties, and your child doesnt like you but tolerates you because of your mistake, you meet up with the one that wanted to be with you but you didnt, pathetic as it may seem he is settling for leftovers, meaning you because the babys dad really isn't the one who was hurt and has already gotten what he wanted out of you and moved on. The reason he left was because he does not want to settle with YOU and wants to get as much sex as possible. Better to have something than nothing even if it is settling:P