As I continued to build up speed, thrusting as deeply as I could, I began to get a reaction out of her. It was subtle at first, but before long, I could tell by her ragged breathing that she was very much turned on by what was happening. While I didn't dare reach out to touch her clit with my fingers, not knowing how she would react and not wanting to spoil the encounter, I did change the angle of my penetration, moving my whole body up a bit until my cock was penetrating her very shallowly and the tip was crashing right against the front wall of her vagina....