My WW moved out in Dec '20. I refinanced the house and she got her half. I have the kids M-F and she has long weekends.
I've had a lot of time to think and work on myself. Working remotely due to Covid and putting out fires everyday with the kids who are remote learning.
Oldest daughter decided not to go stay with her mother this weekend. OM does not want her emotional support animal at the house as it makes messes. Daughter offered solutions but OM says no and WW caught in the middle. Daughter needs her emotional support animal when trying to adjust to the other house.
I think your daughter recognizes it’s dysfunctional for her mother to go from one bed to the next, and probably does not want to be under the same roof as the guy who stole her mom from her Dad. Plus she gets to stay in her own room and sleep in her bigger bed.
My daughters will be facing the same issue in the future. I didn’t think about that until just now. Makes me sick to think of some other guy replacing me.
Nick, if this is inevitable, start planning for separation/divorce now if this seems the most likely outcome. If she is a WW then this is the most likely income. Everyone's situation is different. If you have a long term marriage and she moves in with OM insist she doesn't ask for alimony. You should not have to subsidize her lifestyle if she is living with OM. Figure out the child custody arrangements. I got lucky I guess because WW moved outside the school district and I told her the kids stay in the same school which means they stay with me M to F. She didn't want to do the commute from her place, to the school, to her job, to my house and back again as that's two hours commuting every day. She'd never get a real lunch break.