I found this disturbing but maybe not for the same rasons as other people. I'm a white Brit male with no breasts, not a Black American woman with big breasts, so maybe my thoughts are irrelevant, but maybe she was sat behind someone too tall for her to see past and asked her husband to swap so she could see? And as others have said, maybe she wanted to compliment you. And your comments on her dress sense are patronising at best. Would you have done the same if it had been another Black couple?

Not every interaction between races is racist.