Both archangels start out slow, but they eventually increase the speed and force of their thrusts. They both monitor her reactions and adjust as needed, be it either to slow a little or increase once again; both whispering promises into her mind about her position as their favorite and showing her different images.

All part of the game to overload her. By the time they're done with her, they fully expect her to be incapable of going anywhere but the bed they were currently on.