My issue is that whilst I'm at home, I'm lonely and the house is filled with memories. She's at her Mom's and the house is busy with several people there - How is she going to have the time and space to reflect on the situation?.... How will she miss her family, her Husband when there is no time to reflect?..
1) you need to stop worrying about what she's up to and put your focus on you. If the house makes you sad, then stop being there so much. Use it for a place to sleep and not much more than that. When you don't have your son, get out and do something. Anything. I used to get in at 11 every night just to avoid being in the house alone.
2) your W is a grown adult living at her moms. That's not a long term solution. Just let things play out as they are going to.
