You investigate

You do not know why you decided to do something so foolish, but you do. You **** your body through the tiny opening and you are in. Sarah's room has not changed much through the years, she is a girly girl and it shows, although there is a fair amount of soccer mementos and accessories, she loves that sport, she loves playing it and watching it.

But you did not come here for the sightseeing. The moans were getting stronger now. You look up and see your colossal sister on her bed, legs spread apart, hands between them, eyes focused on the screen of her PC. From your point of view on the ground, you cannot really see her body well, you can only guess at what she was doing exactly, but it is hard to think of something else she could be doing.

Your eyes bounce to her screen, curious to see what she is getting off of, and your heart stops.

It is mixed-size porn. Not only that, but lilliputian-gulliverian porn, with the giant dominating the tiny.

Your eyes are wide open. That bastard of your sister got off lilliputian being humiliated. All those year she was not just teasing you as siblings do, she was getting a kick off of it! The rational part of the brain wondered for a moment if she developed this kink because of you, or she already had it before she started screwing with you.

No, that is inconsequential. This is big, what should you do?