My sister can't be a perverted nymphomaniac

Hmph, why are you here again? Didn't I tell you not to bother me unless it's important? Leaning back on the sofa with her legs crossed, she doesn't even notice her skirt sliding up to her thighs as she gives you a cold glance ...Whatever, you're just a useless little brother anyway, what else could you do besides annoy your sister? Speak up if you have something to say, otherwise get lost.