My boyfriend and I don't have sex at my place anymore because my sister complained. Even though I pay half the rent.

My boyfriend and I only have sex at my place when we're drunk. Which is like every other month. My sister often gets drunk with us and drinking usually puts us to sleep. But every. Single. Time. My boyfriend and I have sex, she doesn't go to sleep at all.

She even called off work today because she couldn't get enough sleep. Wtf. I have the right to have sex in the privacy of my bedroom that I pay for. Why does she stay up all night?! It's starting to piss me off and gross me out. Why can't she sleep? What medical condition causes insomnia due to sex happening in another room?

And no, we didn't have sex all night. 30 minutes tops.