my so won't shower with me when his housemate is home...

vera
I have a long distance relationship with my boyfriend, and we see each other once a month. I came to visit him this time and his housemate wasn't home the first day. Now that she is home, he won't shower with me. He said he wants to but not while she's home... 
I didn't ask why, I respected his wishes. Just wondering what anyone else thinks? We rarely see each other and when we do, we always shower together it's just nice. Would it be acceptable to you? 
 
We don't have sex in she shower so it's not as if there'd be inappropriate noises. Plus she has been sleeping both times we didn't shower together