Is Stephanie Gay? (night of 24/11/2014)

I am spending a lot of time with Stephanie. We may well be sharing a flat. I cannot work out if she is gay or not. I am convinced she is gay, yet she seems to act around me if she is attracted to me. We curl up naked in bed together, yet I am still unsure. I go to videos of her on Youtube, where she is with her housemate - an older man in a beard. They seem very tactile with each other. They say that they will try to act 'more like a couple'. Are they then seeing each other? Is he still living in the flat in a room I have not yet seen? Are they only trying to 'act like a couple' because she wants to seem straight, and not as gay as she obviously is?