mouse120 wrote:
I called the FIL yesterday instead of going through my fiance and explained that I was totally uncomfortable having him there when I opened "lingerie and other sexual things". He totally got it and wasn't insulted at all. He and my fiance are going to show up at the very end after presents to eat and chat before helping us take presents home. I think that's totally reasonable.

That's definitely reasonable. He was probably told it was ok that he came and didn't realize it was a 'girls only' type of thing. Guys are pretty clueless about wedding-related stuff. 

I'm glad it worked out so nicely for you. It was the much more mature thing to do than the 'change the place and time' suggestion in here