Did my wife try BBC

I worked on a little subtle pillow-talk last week. She was telling a story about an instructor at her gym (who is black) and I was caressing her inner thighs while we were talking about him. I kept encouraging her to talk about him more. She seemed somewhat in to him.
I just learned that she quit that gym and moved to a new one closer to home. Just when I thought we were getting somewhere.
Maybe there was something going on?
How Do I find out?
Maybe now that she does not go there she will be willing to explore with him?