SCPX-542 My sister was so engrossed in reading manga that her miniskirt was so revealing that I was overjoyed to get a panty shot! Or so I thought... 7 people, 4.5 hours

My sister's fully developed body is more than enough to make my dick stand at attention... She's now my number one masturbation fantasy, and she's taken an interest in my dick and started teasing me with panty flashes... I wonder when she learned to do such naughty things, leaving me, her older brother, behind... My dick, unable to resist, becomes erect and is sucked into my sister's pussy... Is this a planned, defenseless seduction!? Me...