It's amazing how, after years of recovery, I can now look at things that are not "normal" and recognize them.
I find the whole situation with the fellow in outpatient more than disconcerting.
When I have gone through painful periods in my recovery, which have been numerous over the years, I rely on guidance from my sponsor.
I just see the situation as very dysfunctional, including the willingness to have him "hang out" at your place for two days.
Maybe I am missing something here?