My RAP has been in rehab since the beginning of January, and was inpatient for a week before that, so we're past the two months mark now. I know what you mean about the nice and quiet house! My first order of business was to clean and organize everything too, and it has felt so nice to come home to a calm and clean space.
I was really nervous about the first meeting with the therapist as well, so I called ahead and talked to her about the "game plan" I had. I also wanted to discuss the fact that I wasn't ready to have her come home right away and the therapist reassured me that it was actually something they had been talking about in sessions too, so it wouldn't be a new concept at all.
I think if there's anything you want or need to discuss that might be "hard" then bringing it up in therapy is the absolute best place to do it! The therapist will be able to help your ABF process the info in a safe space. And if they are a good therapist, they will probably agree and support your decision not to have him come home for a while. I know ours was completely understanding and supportive of the extra time and slower pace I needed.
Good luck and let us know how it goes!