She went balls deep on me, just like that. By that I mean I was balls deep in her, but she was the one who did the work, not me. By pushing against my hips with her feet, she started working herself on and off my cock.
I kind of just let her do that for a bit. It was incredibly hot to watch and feel, and the balance part wasn't hard. She was a pretty heavy person despite her lean, fit body, because her limbs were made of metal, but I was just that strong. It took a lot to knock me over.