Sometimes with planning you just assume these things. I just automatically thought my bf would know she's moh and my other bf knew she was in the wedding. And I was doing the same thing, and then she said to me, "i'm in the wedding right." And I was like of course silly, so I know I have done that already. But she did just what was said to ask, and I wasn't offended or anything. I actually felt bad then because I never offically asked. Good luck.