A guy I've been friends with since middle school has a really hot older sister, I'm guessing she's in her early 30's. The other night he had a small group of us over to watch the UFC fight. When I saw that his sister was there I made sure to do my best to sit next to her. She routinely has some great thong exposures and this night was epic. I managed to sit next to her on the couch, she was wearing some low rise jeans and a black long sleeve shirt and she had the black shirt tucked into her jeans. About 15 minutes later, I leaned back, she was leaning forward with her elbows on her knees. To my pleasant surprise I noticed that she had her thong tucked into her shirt, I don't think I've ever seen a girl do that. Since she was leaning forward her jeans naturally slid down in the back which caused about 2 inches of her red thong to pop out (the thong had "Victoria's Secret" on the waistband). The contrast of the red thong and black shirt was fantastic. She eventually got up and went to get another drink, when she came back I waited for that perfect moment as she started to sit, knowing that would be the time the most thong would show. She didn't disappoint, as she sat down almost 4 inches of thong popped out, so much was showing that the side strap of the thong was slightly visible to the front of her jeans. She eventually, pulled her pants up a little but she still had some thong exposures the rest of the night.