I don’t know if this is the sign I’m into cuckolding

Recently my gf and I were swimming with friends and she didn’t have a bikini top so she went topless around all of us. She asked first if anyone would mind it, (possibly to see if I would object) and me and everyone said it was fine.

I found it so hot that she was showing her tits off to all these guys (and girls) and some bum too.

I don’t know how to say it to her how hot I found it, or how to do something similar or even progress it to something more intense.

Does anyone else have experience with this sort of thing? Has anyone gotten into cucking through showing off innocently first?