What's the most awkward moment you've had with your in-laws?

It was when I had to explain that their son had agreed to convert religions in order to marry me. It's not common where they're from -- having to convert religions in order to marry. It was really awkward because no matter how you look at it, religion is really sensitive. They were not against their son's conversion at all just that they were curious and had a lot to ask and I tried to answer the best I can. Although they are not religious at all, to them, a wedding means holding it in a church and a small guest list (of about 80). When we told them we were getting married in a hotel Singapore, with a longer guest list, my in-laws were a little shocked. But all's well for now. We haven't had kids yet and I anticipate more awkward moments from both sides.