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

I wasn't expecting my mother-in-law to help with the laundry so I put my sexy french maid lingerie into the laundry basket together with the rest of the clothes. The next thing I realized was the lingerie was ironed, folded and placed nicely on my bed. My mother-in-law did the laundry. It was sweet of her but I couldn't feel more awkward.