Hey cuz, since we are roommates and we're, you know, FAMILY, could you and your bf be a little more quiet when you two physically show your love for one another?
It's awkward enough to hear people having sex when they're not related to you, but when they are, it's a whole new level of disgusting! I've known you since you were a baby and we grew up together... after hearing you moan and scream while in the sack, I can't even look at you the same way.
In fact, I've had to leave the apartment so I couldn't hear you. Don't you realize how uncomfortable it is for a person to hear one of their relatives getting it on? NASTY!!! —I only have sex when you're not around