Long story short, we were vacationing over the weekend and I guess my mom n dad got… into the mood? We were staying in a hotel and I woke up about an hour after I fell asleep, I heard the bed next to mine shaking in a very obvious rhythm. I instantly rolled over, but wanted to give them a chance to settle down so I pretended to be asleep. Mom whispered something about me waking up, and dad just said something like “fuck it she’s a deep sleeper” and started going harder. It somewhat turned me on, so I opened my eyes and let my hands explore my body. Mom looked at me and gasped, but said nothing. She kinda grinned and just started riding harder. Dad flipped her over and that’s when he noticed me watching. Again, no words spoken. Not even this morning. I’m not sure what to do.