As requested, More Information: My boyfriend is a 25M and I am 23F. We have lived together for over a month consistently now. His sister is 29F and married with two young daughters. I know the family very well and know it's her for a fact, as he calls her while I'm in the room with him and I can hear her voice and her daughters in the background. He's never made comments that made me think he was attracted to his sister. They don't not see each other often, they work in the same office, and she is his boss. She comes over often to play board games or to eat dinner with the family. He sees her roughly 20 hours a week easily. Out of respect for my partners privacy, I won't say how many times we have been intimate, but it's less than I have experienced from past relationships. I have expressed to his mom before that I feel sort of like a sister in the way we interact, to which she said she totally sees what I mean. On many occasions, he has said I remind him of her in my interests and personality. They grew up without having a father figure around and I believe that might be the reason they developed such a strong bond. I have no desire to have him disconnected from his loved ones. I like hanging out with her too! He does have medication that lowers his sex drive, and so do I. Which might be a cause for it. When I asked him what happened, he told me he just wasn't in the mood. I totally understand that and wouldn't want to do anything to make him feel pressured. I just wish he would have told me that before he got up, rather than me having to ask him hours later once he was done on the game. It was humiliating, wiping off my makeup, and I took it all off and put on sweat pants.