Grab her by the pussy

In memory of Sirius, you made Dudley leap upon Petunia like a sex-crazed maniac and starts holding her down.

Petunia screams," OH DUDLEY!!! MY BOY!! WHAT DO YOU THINK YO---" . You immediately rip her dress in strips and starts tying her up. She responds violently when you reach for her panties. " DIDDYKINS. IM YOUR MOTHER NOW STO--", you commanded Dudley to strip Petunia's panties and stuff it in her mouth.

Now being tied up, Dudley spreads her legs and starts to insert his virgin cock inside and slams hard.

Petunia's muffled scream made You so proud that you could dominate your own blood relatives easily. Dudley being inexperienced starts to ejaculate inside Petunia. This became as the last straw for Petunia and she resisted and somehow let herself free and held the nearest object and attacks Dudley.