I've noticed a lot that when people assume others are gay, it's always physical stuff that doesn't really mean anything, touching each other is a bit weak and even a little silly to be considered gay. I'm sure they would have done more or even been open about their relationship, or like most couples had some form of chemistry beyond working well together. (No offense to Jan and Wayne Skylar)
Their connection seems friendly and they're a great duo, but I really couldn't see them taking an interest in one another. If they were gay, they would still go for people different from themselves.