I would be interested to know if you ever saw her naked after this event.
Your story reminds me of some experiences I had with a co-worker about 20 years ago when I was about 24.
We used to go swimming together in a group and shopping at lunch time together and the odd drink. Nothing major ever happened. We were both in long term relationships.
I guess it was just flirting or me missing the signals !
We used to perform shoulder massages on each others shoulders, in fact a lot of the staff used to do this. When I did it to her it sometimes made her very flush in the face. I think she enjoyed it
Sometimes she didn't wear a bra - she was an athelete so was very firm built. One time doing a shoulder massage I was able to manipulate her top in such a way I could like right down it and see the bra-less nipple.
Another time when she was bra less I was able to look right through left to right through the arm holes of her dress and see her boobs. Fantastic. She didn't care too much.
She told me how she was almost totally shaved, just kept a little bit for show because she used to have to change in front of others in changing rooms and didn't want them to think she was weird.
I really felt I could talk to her more than I could to my own GF.
Another time she wanted to open the window in her office so she climbed onto (ie kneeled onto) her desk exposing her stocking top to me as she did.
I used to hear storries about wild sex between her and her BF and thought they were really happy, I found out a few years ago he had an affair.
Ahhhhh - happy days.