My stbxw is moving out in august. She got a new 2 room apartment. I'm already happy about that bc living with her is very tense at the moment.

She leaves our son (13) and our daughter (16) with me. Our daughter though wants to move to 50% to her apartment. But not until september/october. After our son heard the news he said he doesn't want to do the same and wants to stay 100% with me. This is not really a great situation bc I want both children to be happy and it seems he isn't. There isn't a room for him in the apartment of my stbxw. The proposal was to use the extra room for both kids but then they would not see eachother anymore (they would weekly switch was my stbxw's idea) I didn't want this either, I think the kids should see eachother and that would be at our (old) place. But he kind of doesn't care, he thinks she broke up with me and she is the one who has to leave. (It's treu, he found out himself). First he didn't want to visit her at all but after many conversations I persuaded him to at least visit her once in a while (she moves a 20 minute walk away).

My friends tell me it would not be good for our son to see her move out and initially she wanted to move out when he would be on a weeks school holiday at the end of august.

That though changed. My stbxw doesn't care anymore about that and wants to move immeadiately in august. First with a matras only and then move stuff one by one to her new place. Which would take at least 10 drives in a normal car. Which will presumably take a few days to do.

I have no idea what is best here. I wanted to prevent to slowly see his mother leave, cause I think that could give him some mental damage. But I can't prevent it, stbxw made up her mind and as I know her she will do so.

Is this really bad for our son? Surely he will survive but I have many doubts....