A high-risk sex offender pummeled and raped a 21-year-old actress in Hudson River Park at dawn Saturday as she stared into his eyes, begging him to stop.

“I was looking him in the eyes (asking) him, ‘How can you do this? Don’t you have a mother and sister?’ ” the Tribeca woman told the Daily News. “He was like, ‘They’re dead. Shut up.’ . . . It was a nightmare. . . . It seemed like it lasted forever.”