Harry has lunged at him. Pushed him into the dirt. Begun to touch and kiss him against his will. Grinding against him, he's driven mad by the Curse and his own desperate desire to get Scorpius to finally push him off. He just grabbed him - drove the pain of his kiss into his flesh like a spike - hurt by Albus" emotional coldness, Scorpius now lies motionless on the floor as strong arms yank at his trousers.