i have come close to being walked in on 3 different times:

1) me and my ex used to have sex in a park regularly because we didn’t have a house we could use. her parents kind of hated me and mine didn’t know about her and were home all the time. this park was near her school and fairly secluded, we’d go during school hours when we had free time. so we’re having sex there like we’d done many times before, and some lady walks in to the park, not super near where we were, but it was enough to make us feel weird and stop.

2)my girlfriend and i had just finished having sex and took a shower like we sometimes do. her mom wasn’t going to be home until 5:30 and it was only 4, so no worries there, right? wrong. we had gotten out of the shower and only a couple minutes later, her mom pulls in the driveway. my girlfriend was heading downstairs to feed the wood stove and was putting her shirt on as she headed down. fortunately she got her shirt on right before her mom saw her. and i was lucky because i had permission to be there to pick her up. but still a little too close for comfort.

3) we were having sex at my house, i was planning on leaving at 2:45 so we could be gone before anyone else got home (since my parents hadn’t met my girlfriend at the time). almost as soon as we pulled out of the driveway, i pbum my dad’s truck. i hoped he hadn’t noticed her in my pbumenger seat. the next day i got a talk about how he could have walked in on something if he had come home just a little earlier and how my girlfriend looks young and blah blah statutory enjoy if she’s not 18 (really she just looks young) and how i shouldn’t bring her to the house when no one else is home “for obvious reasons”.