From the web site:

"My sister always meddles with my affairs, she constantly talks to my chicks. She always wants to teach me something. One day I looked upon her as a sexual object, an object I would love to fuck. I started seducing her, walking around in underwear aroused, asking her for a towel when I'm in the shower. It worked out, I made her want me. A moment came when she pretended she was about to say something in my ear, rubbing her breasts against me. I got what I wanted."

Of course reading a  magazine together doesn't hurt.