Hermione pushes the extreme

Hermione’s mom can’t get enough breath to speak around her daughter’s cock, but Hermione pays no heed to her mother’s gurgling whimpers. She taps her wand against the base of her cock, barely visible between her and her mother’s cunt, and enhances herself further. Before the spell starts taking noticeable effect, Hermione’s mum starts choking out a desperate squeal, weakly writhing around Hermione’s growing rod. And grow she does, expanding ever bigger within her mom’s distended belly, popping her joints and pressurizing her enough from within to bend her bones slightly.

Her mother’s torso is warped to conform to her absurd cock, her curves pushed out like a balloon. The muffled screams grow higher pitched, but also fainter and more garbled as Mrs Granger’s voice box is crushed by her daughter’s engorged cockhead.