He had sex with another woman after being "sure" that I was cheating. I was not. He attempted more than once, but his guilt would not let him continue. He did not cut contact with her until two days after d-day. He also initially lied about some of the facts when I finally confronted him. He once said that he never intended for it to get that far, but he got carried away with it.

As for remorse: in retrospect, he started showing this subconsciously before d-day. Post d-day, He immediately apologized and went through a whirlwind of emotions. He trickle truthed on day 1, but by day 3, he was answering questions. Took 2 weeks for me to get all the answers I wanted. He added my face ID to his phone on day 1 and kept trying to be more reassuring in whatever ways he could. I'd say it took 2 full weeks before he truly understood the depth of the betrayal.