How does Ginny react to Harry’s nub?

As Ginny lifted up Harry’s skirt, she saw the one inch nub and his shrunken balls and let out a mocking laugh.

Harry was hurt by Ginny’s reaction, but Hermione explained to Ginny that Draco had reduced Harry with a spell.

Ginny then pointed her wand at Harry and said, "Suctus Engorgio," before Harry was hit with a pink pulse.

Hermione paled and looked at Ginny as Harry asked, "What do you just do?”

Ginny responded, “That was a spell that made it so every time you suck a cock from now on, your tits will swell a centimeter,” causing Harry to turn red with both anger and embarrassment.

Ginny told Harry she would tell Dean to meet them in the quidditch changing room at 7:00 that evening so he could begin practicing to suck cock for Draco.