Either these women are very picky about who they side themselves with or Lynne has done something abhorrent to them. It can't be just her exercise attire; then again we can only see the front of her outfit. Perhaps she has a blue word on the back. But the ladies also cannot see the back of her running gear. She must have done something else. She must have embarrassed herself at Ken's party. She got so drunk and gave Ken what he wanted by flashing at him. She then promptly jumped into his swimming pool and then drove home. Some other people were impressed, especially Ken, and whooped and hollered. These women, the old guard of the community and therefore invited to everything, were not.
Lynne seems impressed with her own epigram. Of course it's not hers, it's Oscar Wilde's, but Lynne won't know that. She's just heard it passing conversation and has now passed it off as her own. She is aware, however, that it is not her own so just mutters it to herself. If the old ladies managed to hear it they would be absolutely up in arms. Not only is she a drunk and a stripper, but a plagiarist as well.