Think of it this way. They may have been a couple. That would explain her being rude because you gazed at her lovers ass.
Men are perceived as a threat of some kind. Personally I have nothing against them but the don't fully understand heterosexuals. So don't take it personally.
I've seen two lipstick lesbians together and at first you'd never put two and two together. But subtle gestures can eventually give the game away. It surprises me that even in our modern times some of them still feel they need to hide their sexuality.
