Excellent post, @LemonyTicket.
Amy, I’m so sorry that your Partner has inflicted this devastating injury on you.
He didn’t protect his fidelity. He made that decision. He wanted to have sex with this OW, and was willing to defile your and your child’s home to do so. He wanted to cover up his adultery, so he lied when you called. When rumbled, he did admit cheating in your house, but feigned vagueness on details and cluelessness about how/why it happened. I don’t buy that. He had an agenda to shag OW, and took advantage of your absence to make it happen.
They contaminated your home for about 2 hours. He was ‘with it’ enough for sex and conversation, to arrange OW’s taxi, and to deviously concoct and deliver his deception. In my view, he remembers everything and is manipulating you with his hazy memory nonsense. He orchestrated this infidelity because he could, and believed he wouldn’t get caught. His crocodile tears are for himself.
I would now feel a strong aversion to both the house and the man who so cavalierly abused my trust and trashed my child’s stability for a cheap thrill.
He needs to experience the sharp consequence of leaving while you process your thoughts/feelings and he works on himself. He is not remorseful, as he is still lying to you and blocking transparency. I wouldn’t even consider reconciling until he comes clean with the whole story and cuts out the minimizations, so you know exactly what you’d be forgiving. He’d also have to dig deep (via IC, infidelity websites, etc.) to investigate his character flaws that enabled his cheating and violation of your and DD’s safe space.
Relationship counselors estimate that restoration of trust after infidelity can take 2-5 years, and that’s when the cheater has moved mountains. For many betrayed partners, the trauma is too great, so it’s game over. It would be for me.
Keep posting for support, Amy.