Every bit of pleasure, pain, and domination they inflict upon you drives you wild, your face contorting uncontrollably into expressions of beautiful agony.
You tell her to spread her legs, then take your crop and give her pussy a few sharp smacks with it. Her moans of pleasure and pain combined are music to your ears alongside the wet slaps of leather on skin.
You order her to spread her ass cheeks for you. She does so, and her reward is the stinging sensation of your belt whipping against her holes. Slapping asshole and pussy directly as she cries out and moans.
With her current position you take full advantage of the fact that her pussy is easily exposed to you. Bringing your hand down for a stinging slap, and even as the clamps her thighs around your hand out of instinct to reduce the impact, it still sends a shiver down your arm and her spine.