I [40M] had sexy encounter with new massage therapist 50?[F]

I have been to many massage places (from 4/5 star hotels, spa like places in hotels/spa’s all over the world. I have had probably 50 massages in the past 20 so years for 2 years I went regularly for back issues). All very reputable, never any Thai or Asian massage parlors. I typically go to some massage places that offer monthly subscription and you wouldn’t expect to have sexual encounters. It is a typical afternoon, I check in at the front desk tell them all my aliments, then they lead me back to the sitting room. I am futzing around on my phone when my massage therapist (Jen) [not real name], calls me in and directs me to the room, she was stunning. She was about 5’8, really dark African American, B/C cup, athletic build. She was really good looking, initially I thought she was 20, but later I realized she was older. We go to the room and after a quick talk, I am left alone, I strip naked, go in between the sheets on the table. She comes back in and then begins to massage my back. First sign was that she pulled the sheet really low (at the top of my butt), so she knew I was naked.