I'm getting married in the chapel at my alma mater, which also happens to be where I work. We won't be able to invite my coworkers because of cost/space at the reception, so I've tried to avoid discussion at work. However, the topic has come up a few times with some coworkers and with one older woman in particular who is also an alum, got married in the same chapel, etc. We are very friendly, but because she doesn't work in my immediate team/department, I couldn't invite her without political fall-out even if we could fit coworkers. When I was initially evasive about her questions, she made a point of making it clear that she really just likes
talking about weddings and that she doesn't expect an invite or anything (after which I've been less evasive, but still cautious of course).
However, the other day she did make an offhand joke about 'sneaking' into the chapel just for the ceremony part. Personally, I would not be at all bothered if she did this -- the chapel has more than enough capacity, and I really like this woman and wish I could invite her for real (and all of my coworkers, truly), and I know she doesn't then expect to go to the offsite reception. But obviously it would be the worst kind of rude if I were to explicitly invite her to attend just the ceremony.
So, if she initiates it, is it really rude if I just...let this happen? Is there something polite and kind I can/should do to stop her? What's the polite thing to do here?