Beans sorry that you find yourself here. My H said the same babble when he wanted out. After 21 year M and into an A less than 2 months he told me he was not happy, I was controlling, he was lonely etc. Everything but the truth that he was screwing around with his direct report at work. It took him 4 more months to admit he had OW.
I also have a D15 who is angry with her father and has had no contact with him since Dec 22.
I will tell you that there is NO WAY that your H should be exposing your D to the OW. How dare he? Especially since your D is not strong enough to stand up to her father you need to set the boundaries. Bring it up in counseling and if the C says the father can take her -- CHANGE counselors. It is enough trauma that your H left just over a month ago and now he is bringing your D around this tramp?
He is taking advantage of you. I am a believer in exposing the A. It takes the fantasy out of this dirty secret and exposes it to the light. Tell his family, tell his friends. Even OW H. Maybe the poor guy is going through the same agony but not knowing his wife is cheating. So he gets mad, he is mad already. The more people that know the more their affair is exposed to the light.
How did your H hear you were going through depression? Make sure stuff like that does not get back to him. If he decide to D he can and will use it against you. Instead when he comes over dress up, put on makeup, be happy. No R talk -- nothing. Stop texting or looking for reasons to talk to him. Take away his power. You can do this.
Me 53 H 50 D16, D29 M 22 years bomb 7/08 INH - alien pod replaces H 8/08 - OW (direct report), I work there also bomb II - H moves 10/1 expose ow 10/22 D to be final 9-09