Housemate vs Boyfriend

Advice needed! 
My housemate and I are in talks about the possibility of renewing the rent and it recently came up that she is super uncomfortable when my boyfriend comes over, cos she can hear us having sex from time to time. He's not over everyday and we stay out of everyone's way, keeping to my room for the most part. And we DONT have sex every time he's over. 
Now, my housemate comes from a churchy conservative background and with her recent thoughts come to light, I'm starting to feel judged for my lifestyle choices. But I love my rental, how can I salvage the situation so that we can all live nicely for the coming year?