Make him brainwashed, but resistant.

"Right now, you would do anything I asked happily, right dad?" I asked. He nodded.

"But that's not what I want," I said. "I want to break you. I want your mind to tray and fight back."

"Okay, son," said dad in his trance state. "I will resist you."

"Good," I said. "Now, go downstairs, and wait like you're going to punish me in the kitchen. You found crossdresser porn in my room."

"That's a bad son," he said, still in a trance state.

"Good, now go get ready to punish me," I said. I snapped my fingers and he nodded. He left the room.