H spent 2 nights last week with the OW. I know this because he leaves D14 home alone. One night she was at a sleepover but the next morning he couldn't be bothered to pick her up. Didn't even answer her texts then lied about where he was. The other night he was supposed to be on a business trip. He threw a fit and wanted D17 to stay there (she didn't). He came home "supposedly" for a meeting but didn't come home. Lied and said he didn't want to bother D17 since she was there (she wasn't).
I'm still struggling with being replaced after 30 years. He's out having fun while all our lives got turned upside down.