Caught In The Act?

So this happened last week and I've been ruminating over it ever since. My name is Dr. Thomas, a professor in my late 50s at a local university. Been single for the better part of three years now, just dating casually to get out there, meet new people. I had started seeing Lisa over the past couple months, nothing serious but we were enjoying each other's company. I'll admit, as she got comfortable around me, her clothes would get a bit less conservative. She wore tighter tops and short skirts at times. We'd grab drinks after work sometimes, sit in my car a bit to cuddle. Last week though, things took an unexpected turn. The evening we were supposed to meet up for dinner, I received a message from her that said she couldn't make it but wanted me over for something special instead. When I arrived at her apartment, she greeted me dressed in lingerie and led me straight into the bedroom. We talked, teased each other. It was getting steamy fast as we got more comfortable together. Then she surprised me by leading us onto the bed. I thought maybe it would be a night of passion, but she insisted on tying me up with silk ribbons first. She undressed completely and climbed over me. We did what we did. Afterwards though, it was hard to shake that feeling - was this all just a game to her? It's left me wondering if I should proceed with her or end things now before either of us gets hurt worse. We're adults here so no need for legal concerns, but emotionally it stings. I'm not sure what she sees in me beyond some physical attraction and a way to feel adventurous. Still unsure whether this was just another casual fling trying something different or if there's real feeling behind her words and actions. Gotta figure out my next steps soon.