It sounds like you have a great place for you and your son. In my experience, housing changes always bring that mix of anxiety and excitement. I hope you both enjoy the chance to make the new house a true home for yourselves. Having some closure on your housing choice should bring you some much-deserved relief. Congrats!
Since your son has to spend time with her, it's reasonable to monitor her housing situation though it is out of your control. If it impacts your son's quality of life or well-being (safety issues, difficulty studying, unhealthy conditions, etc.), you'd have to tread carefully in raising any issues about it and an IC can be helpful in rehearsing your approach. Hopefully, it won't become an issue.
Concern about the well-being of the mother to your child is an interesting wrinkle in terms of detaching from the care you have/had as a husband. Our fates are tied to these moms for as long as our kids are around!
