My sister had washed all her underwear and was covering her private parts with bandages because she felt it was embarrassing to go without panties! She forgot about that and went about her day as usual, but her skirt flipped up and I couldn't help but take a second look! When I asked her about her panties, she said, "You can't see them, can you?" and didn't seem to care, but she was so sexy that I couldn't stop staring at her and I got an erection... And just when I thought she'd find out and get angry, she got excited seeing my erection and her bandage got all wet... At this point, anything's OK!