You don't have to unpack the house just because W emotionally left the M for the time being. We've all heard the typical WAS speech that "they're never coming back" and they DO after their affairs die down. Stay the course as you've only been at this for a month.
You're in no state to make any big decisions. I get that you're in a world of hurt right now. You are acting on your emotions instead of with your head.
I bet that the ILs haven't said anything about the house. Right? Then stop packing up the house. It is defeatist thinking on your part. Step away from the packing boxes and nobody gets hurt.
