That's funny. Not that you ended up in a psych ward, just the comment on having it slip past you that she'd have her own sexuality.
People tend to hide this IRL. I think there are a lot of reasons. You can pretty much count on it that most people where many masks, there are ample sides to them, your simply seeing one fascade. I have for instance a couple twins who lived down the street (girls) who also have and older brother - they're devout nondenominationals, ie. their parents had them listening to nothing but Christian music (Christian pop, Christian rap, Christian progressive rock), the older brother just got back from 10 years of missionary work in China, the twins are librarians/teachers in Virginia I think? All still very wholesome but, I would have a hard time - if they were married - imaging them being stagnant than not having a sexual identity within their marriages, if it was really like that they wouldn't be here, we'd have aging devout religious couple who had no kids or adopted a bunch from third world countries.
I can I guess relate to something like what Hale mentioned, ie. when I was in 4th grade I went to a restaurant with my parents and saw my art teacher drunk with her friends. Not that it rattled me but, the mode of conduct did seem very different. When you're only used to seeing adults as authority figures and not used to seeing them behave like a peer (perhaps not to you but to people with them) its a bit of a new experience. As you get older, expecially after your teens, that gap starts falling off. My boss and my bosses' boss - one's in his late 40's, the other is sixty, I call them by their first names rather than Mr. ____. Life just shifts like this, and unless someone has a very high office or place in society relationships that used to be deemed 'vertical' are much closer to diagonal.