Get her attention and tell her what you're here for

"Hey!" You barked, trying to get her to notice that you entered her room. Still, it wasn't enough for her to hear you over the eardrum-blasting tones of her music. You strode over to her and yanked the headphones right off of her, shouting right in her ear. "HEY!"

She startled, pressing herself back against the wall. Glaring at you, she settled back down and turned back to her comix, as if you weren't there. Rude, as usual. "What the fuck, dude, there's no need to act like that. What do you want, anyway?"

With a hint of nerves, but a big grin on your face, you pulled out your cock, rubbing the hardness into it. "I think you can probably guess."

Caitlin startled, looking nervous and slightly disgusted, but nowhere near as **** a reaction as a situation like this would normally result in. "Seriously? Just gonna whip it out in front of your own sister? That's kinda gross." She sounded like she was trying too hard to sound indignant- like she knew that you were in the right.

You nodded, a serious look on your face. "Well, there is the matter of my 'own sister' being a lesbo, right? Nothing I can do about that, is there?"

Caitlin glared at your penis, as if willing it to burst into flames, but gave in, as she now had to. "Uugh, FINE!" She put down her comic, but didn't make any other move on her own, obviously meaning to deny you any enthusiasm on her part. "So, what are you going to make me do first, sir?" She said, voice acid-tipped.