Everything

"And what exactly is everything?" The lamia asks as her tail continues to thrust in and out of Hilda.

"I'm... I'm a naughty knight... a-a weak knight," Hilda moans. "No... I'm not a knight... I'm just a horny little slut that pretends to be one... mmmmm... I love being held down and pushed around... being humiliated... losing all control of a situa-"

The lamia silenced Hilda with another passionate, venom-filled kiss. "You really are a dirty girl, aren't you?"

"N-Nnn-NYES!" Hilda cries out as she feels another orgasm approaching. But then, just as suddenly, the snake girl stops. "NOOOOO! DON'T STOP I NEED THIS! INEEDTOCUMINEEDTOCUMINEEDTOCUMINEEDTOCUM!"

Hilda is desperate for release, but between the lamia's grip and the venom in her body, she can't move enough to get herself off.

"Not so fast, dirty girl," chides the snake girl. "Dirty girls don't get off that easy. They have to earn it."

Hilda is well past the point of rational thought at this point and starts babbling. "PLEASE I'LL DO IT. WHATEVER IT IS I'LL DO IT. JUST LET ME FINISH PLEASE!"

The lamia just smiles back at her prey, her cold-blooded nature coming out. "I know you will."