I lived with my parents in an apartment in my grandparents’ house, so I was never really able to bring anybody home, because there was always some adult present. When I was about 16 I went out with this guy who was 21 and he came over once with another couple, when my parents were on vacation (the first and last time they left me home alone). The other couple slept in my parents’ bed and I slept with my boyfriend in my bed. When my parents came home they realized from the bed covers that someone was in their bed, and they swore it was me and my boyfriend, which I swore it was not, and I wasn’t lying.
Another time I was with that same boyfriend in my room – I guess my parents were out for the weekend, and we were fooling around and my grandfather started walking up the steps. I hid my boyfriend on the side of the dresser, so when my grandfather poked his head in he couldn’t see my boyfriend. I am guessing that it was pretty late at night, and I think I acted like I just woke up to get a drink or something, so my grandfather didn’t stick around. He went back down stairs and we got back down to business.
Other than that, I would have gotten killed for fooling around at home, and that would take the fun out of it, so no, I pretty much behaved myself in the house.