I was teaching her how to study, but my younger sister ends up lying down on the bed, saying "just for a little while." I thought she was dozing off, but she turns over, revealing her white thighs and panties! Knowing it's my sister, I can't help but get excited and cautiously lift her skirt and stroke my dick, and then my sister wakes up and notices. The brother apologizes, regretting his actions. My sister thinks it's a little sad. Because you've been holding it in, you're going to make your sister your side dish, right? I'll help you, so let's get it out and feel refreshed. To the brother's unexpected proposal, the sister...?
