A busty office colleague mounts me and ejaculates on her own shaft

I was at work in the office, and my colleague came in with a big ass and big tits. She started to act like a whore and mounted me. I didn't know what to do. I was just trying to get her off of me. But she kept going and going. Finally, she got so turned on that she started to jerk herself off and then she came all over her own shaft. It was a weird feeling, but I kind of liked it. She was a hot MILF and I would definitely fuck her again.