DeGeneres claims her stepfather sexually molested her during an interview with David Letterman for the forthcoming second season of Netflix’s My Next Guest Needs No Introduction, which premieres May 31.

“It’s a very horrific, horrible story, and the only reason I’m going into detail about it is that I want other females to never, ever let someone do that,” DeGeneres said during the episode to Letterman.

“My mother had breast cancer shortly after they married,” DeGeneres explains. “She had a breast removed, and they had a highly sexual connection, which was also quite uncomfortable.”

“When she was out of town, he told me he’d felt a lump in her breast and needed to feel my breasts because he didn’t want to upset her, but he needed to feel mine.”

“He tried to break my door down, and I kicked the window out and escaped because I knew it was going to do—it was going to go more to something,” DeGeneres says of her stepfather’s repeated attempts to feel her breasts.