Friendly for a time, and still friends [M40]

I was in my mid 30’s, she a few younger. Both in rough patches with our significant others and had taken to an online ad in search of out of circle affection. We’d talked for a month almost straight about all kinds of things, likes dislikes, things going on at the time and of course the ideas we had if we were actually going to meet. Planned out a day, literally down to what she’d wear and we met. As soon as the garage door was down she hopped out of her SUV and I pinned her against the wall kissing her deep and directing my hands to see if she indeed didn’t wear anything under her skirt. Her bare ass cupped perfectly in my palms. I mentioned something to her about the follow through, she mentioned she enjoyed the pinning. I grab her hand, lead her to the stairs to the apartment and ask her to walk to the top, and mentioned I wanted to watch her ass move up the stairs she obligated.