Yes

Bellatrix's grip on Harry's penis tightened, her fingers squeezing him as she continued to stroke him. He felt a wave of shame wash over him as he realized that he was getting aroused, despite his best efforts to resist. He tried to think of something else, anything else, but Bellatrix's touch was too much for him to ignore.

"Ah, I knew you would enjoy this," Bellatrix whispered, her breath hot against his ear. "You're such a dirty little boy, Harley. You need someone like me to take control of you."