You've got to your friend's house for pre-drinks, but your friend's just popped out to buy some drinks. While you wait for him to come back, you see his gorgeous sister shaving her legs in the bathroom, and she's wearing a very short dress and you're able to see a bit of her panties from behind. She clocks you and quickly realizes you're checking her out! She's game for some fun, but just don't tell her brother or you'll be in a world of trouble!