Sarah's sexuality

Watched this movie on the plane as I had watched every other one. Kind of boring movie, in that it depicts an everyday life situation. However, just wanted to check the following; it may seem obvious but just to see if I got it right. There's this scene where the running girls are taking a shower and the camera pans to the bodies of the runners, as if it was Sarah who is watching. Then, I believe the next scene is Sarah and her "husband" having sex, but she is quite unresponsive. The following morning she says something like "I don't think it'll happen again, I don't think I'm into this". Are we to believe she may prefer women over men?