I haven't had him initiate sex, probably won't. I would be placed in a very awkward position, since I haven't asked about the receipt yet. It could do a lot of damage. Hopefully, I can do it after the holidays and then deal with the damage...I still am AMBIVALENT about that one. (;}
I think you raise a very valid concern. What we can do is offer suggestions on how to handle your discovery of the receipt. Ultimately the choice is yours. I do want to leave this thought with you:
Pick your battles wisely
You don't want to die on the receipt hill, right?! Given the totality of your sitch, you may find that there's no need to bring up the receipt's contents in a month's time or down the road as things will, hopefully, progress for the better.
Again, you know your H the best and can figure out the best way to proceed. Whether it be giving him the opportunity to explain it or letting it go. Many of us have had discoveries and never said a peep to our spouses. It seems to be, from my perspective, that you are obsessing over the receipt a bit too much. How can you work through this?
The cruxof this present dilemma is this:
Do you still want to keep your hand on the hot stove or remove your hand? The choice is yours.