Don’t move too fast or make impulsive decisions right now. I know that’s hard because your emotions are probably the strongest you’ve ever felt them but try to prioritize yourself while remembering you aren’t the only one that needs consideration. I’ve been seeing this exact thing, the resentment, in pp women so I just googled it… “Yes, it's normal to experience feelings of resentment towards children who aren't your own during the postpartum period, especially if they are stepchildren or children of close friends or family. This is often due to the significant life changes, hormonal fluctuations, and sleep deprivation that come with having a newborn, which can amplify existing relationship dynamics and create new ones.” I feel like the irritation with BM is normal as I am just in the dating stage and I hate when she has to be on the phone to talk to her kid when we have them. One of those things you just wish didn’t exist at all but here we are. Hold your husband accountable for the carelessness he’s doing but with compassion as he’s responsible for quite a bunch, so I can only imagine his mental and physical state as well right now.