My wife suggested we try nesting, anyone have experience with it?

My wife has decided separate bedrooms wasn’t enough space. She’s having a lot of mental health issues, has said she doesn’t feel anything for me and is really angry at me. She’s in therapy, partly because she can’t really articulate why she’s angry. It’s like she’s mad at me for her not loving me anymore. Anyways, she mentioned possibly nesting to make separation easier on our kids. We just moved into a new house 2 years ago and the idea is to keep the kids in the house, then we switch off using a shared apartment. Does anyone have any experience with this, thoughts, suggestions? I still love her, but it’s pretty miserable being in a house with her. I just hate the idea of being a single dad because we’re actually still really good parents together. I guess nesting is really just to make the process of separation easier on the kids?

PS - it’s important to know we did 4 months of couple’s therapy and the therapist eventually said they couldn’t help because my wife wasn’t invested in it. I’m also in therapy just because this sucks and it’s hard.