A little back story. Partner comes from a home where the women are extremely open. Yes they talk about sex and dildos and all kinds of weird things with each other and their own mother. They also go family skinny dipping. Back story on the twin. They are not identical, but are extremely close and competitive. They are quite "revealing". Will sunbake topless at beach. My partner only at secluded ones with less people to bump into. Her sister does it anywhere. Even at home by the pool. She also likes to show off her ass with a thong. That's a thing. I had seen her naked before this point. She walks out of the shower with a towel, sometimes she forgets it. I am positive she does it on purpose… who knows. Plenty of stories. She is really comfortable in her own body and she is hot too, which helps. (I wrote this bit after)