I've done so many scenes in
The Serpent's Eye that would fit here. The scenes where Sabina was whipped on the cross were particularly obscene since they depicted sexual torture.
Gundericus, the executioner's helper, swings the whip. Sabina was helpless to protect her soft round breasts and swelling nipples from the searing strokes of the whip that came inexorably, one after the other. In this picture, she has twisted her hips away from him and her legs are together in an effort to protect her
porcella from him, knowing that it's only a matter of time until he will whip her down there, too.
From this angle it's easier to see her twisted hips and closed legs:
But the agony in her breasts, the whip leaving burning, bleeding welt on top of welt, builds until it is beyond bearing. She has only one option to try to draw his attention away from them, if only for a few precious moments. In desperation, she spreads her legs wide, thrusts her hips forward and forces herself to turn them more toward him, presenting her soft labia, clitoris, vagina, everything, fully exposing and offering them to the whip.
Will the sacrifice she offers be enough to turn the whip away from her burning, throbbing breasts? Her body trembles as she struggles to hold herself open for what must be coming.
Her face is turned away from Gundericus so she won't have to watch; if she sees the whip coming she knows she can't control herself. Her legs will close on their own, she'll never be able to hold them open, and she has to, this is her only choice. But she can't stop her eyes from being drawn toward him in horror.
When the knots of the whip strike, driving into the soft flesh of her cleft, the most sensitive part of her body, the stinging, searing pain forces the air from her lungs in a wild, helpless scream. Her hips jerk backward reflexively in an effort to escape the source of her agony. Shaking, she pulls helplessly against the nails in her wrists and feet as her tortured body twists and writhes.