While tricking him into having a child is despicable behaviour, why didn't your dh use a condom? I assume he had a choice who he slept with?
He had his fun & now wants no responsibility...nice.
I cannot imagine my child being taken care of by this deceitful, despicable woman with zero morals What about your deceitful, despicable ex with zero morals the way you talk about the OW is revolting. Your dh used her, doesn't want to stand up to his responsibilities, dropped her like a hot cake as soon as he was busted & you have the audacity to talk about her like this?
she was coming over to his flat seeing my things, clothes, toiletries all around... she knew he was not a free man, she knew we were spending most of the week as the family, even though we kept separate houses. She didn't care for months, and slept with him. I hate them both for lying that much, for that long. So is this right, he left because you busted their affair, you tried to make a go of it again, he still slept with her & it's what...all her fault? It doesn't matter what SHE knew of his circumstances, HE still cheated on you. HE could have said NO. He wasn't forced to sleep with her, she didn't hold a gun to his head!
I do see that you are blaming him, but all that reads as secondary to you blaming her, and taking any opportunity to be vile about her.
I do have sympathy with you, but I also have it for her, because she has been royally shafted by your dh & by you now too.
Your daughter will be fine, as long as you let go of your anger & try to remain as neutral as possible towards her father.