I (26F) had sex with my husband while my sister was sleeping in the same room

So here's the context: I just moved across the country (2300+ km away!) for a PhD program, and my husband and sister helped me settle into my new university. Since it was just for a night, we booked one room for the three of us to save some money. Dumb idea? 100%. Especially when all my husband and I could think about was one last round before we’d be in different cities for months.

We were so horny it was ridiculous. He even suggested doing it in the car like we were teenagers again, lol... but we only managed some oral and teasing. We tried sneaking into the bathroom while my sister was asleep, but the vibes were totally off cramped, cold, awkward. Not sexy.

We gave up... or so we thought.

We got into bed (separate beds, thankfully), and were cuddling under the blanket, trying to keep it chill. But my husband’s hands started wandering. And then suddenly, he was pulling down his shorts, sliding my pajamas off just enough, and slowly slipping inside me...all under the blanket, with my sister less than 10 feet away, completely asleep.

He had his hand over my mouth to keep me from moaning (I almost failed at that), and started thrusting slowly, then harder… It was SO risky and SO intense. The whole situation, the desperation, the silence, the thrill made it feel way more erotic than anything we’d planned.

We both came fast. Like, embarrassingly fast. But it was the hottest goodbye sex ever.

I don't know if I should feel guilty or just call it a core memory. Probably both.