A girlfriend flew over to visit me and stayed at my place last month. She took a red eye flight and only arrived at like 5 a.m., which means by the time we got home, it was not yet 7 in the morning on a weekend.
Since the whole family was still sleeping, I suggested taking a shower together on the pretext of getting some action (evil laughter). Took me awhile to peel through three layers of clothes before rubba rubba.

All this time, she was moaning softly and making noises.
Then just after we position nicely with her bent over the sink, and before I can enter her, my father knocked on the bathroom door and asked what I was doing.

Shouted that I was taking a shower and quickly turned on the shower spray, which was ice-cold water. We both yelped from the cold water. Went from rock to jelly in less than a minute.
Of course, by the time we meekly came out from the toilet, he saw us and we all just smiled awkwardly.