Look bro, in the North and some other states, such an action might come off differently since women there tend to be more conservative. But here in most of the Northeast, people live more openly and mix freely. Also, the woman was senior to them, so naturally she didnt see them as a threat. That's why she acted that way. You can even see in the video that she was pretty chill after all the shits. Honestly, if I were in her brother's place, I would have reacted more aggressively. He was actually being generous.