"I guess it's fine to just go out like this," my sister-in-law thought, and went shopping nearby without a bra. On her way back, she was suddenly caught in a heavy downpour and got soaked from head to toe! And because she wasn't wearing a bra, her T-shirt clung to her breasts, making her nipples clearly visible through the fabric! Even though it was through her T-shirt, seeing my sister-in-law's breasts made me instantly hard! Worse still, she noticed my erection, and I thought that was it... but then she saw my erect dick and got turned on herself, coming at me fiercely!
