After washing all her underwear, my sister hid her privates with band-aids because going commando was too embarrassing. One day, as she went about her usual routine, her skirt flipped up and I couldn't help but do a double-take! When I asked about her panties, she casually said, 'You can't see them, right?' She didn't seem to mind at all. But when I stared lecherously, I inevitably got an erection... And thinking I'd get caught and yelled at, my sister started getting excited seeing my erection, her band-aid becoming wet... At this point, anything goes!
