"Intrinsic de M constitution that is happy enough to be violent" Younger sister who sucks and sucks hard with a small mouth while wetting the meat stick sticky with saliva. Her head is grabbed and an erect penis is pushed into her throat so violently that it penetrates from the back of her head. Her sister is teary-eyed and she sobs, but she happily smiles back at her brother. Erotic and obedient, and de M constitution. She is exactly the ideal sister.
