I am ashamed to share this.
When my last ex bought crepes, I just ordered one ingredient, cheese.
He would ask if he could get what would have been my second ingredient for HIS crepe.
I get a similar impression here that even in rehab he wants you to keep paying. You mention he used to steal? So it is about what HE gets.. and what is he giving you?
I would not pay for anything extra for him. Due to his problems you do not have his support at this time. Due to his problems you are stressed in a stage where its paramount for you to be relaxed and healthy.
I can now see selfishness and I see it here. Please listen to Thumper and all the others. Sorry if my post sounded hostile, it just reminded me of how some people just want to take, take, take. Its up to us to be done, and to have enough clarity to set our priorities straight. Alanon might give you the company and comfort you need, hope you can get to a meeting, so you feel more supported and understood!