My hot step sis is always showing off her gymnastics medals and bragging about how she's the most flexible of her team. I also know for a fact that she's highly competitive and cannot say no to a dare. This is my ticket to finally get to fuck that toned body of hers and put all that flexibility to good use. I walk in on her daily stretching session and say I've never seen her do a split. She gives me her usual smirk and proceeds to do one without flinching. I tell her she could never do one on my cock. Whaaa!?! Well, no need to answer because I know full well you can't do it. Ha! That's all the push she needs to unzip my jeans and start sucking on my dick, realizing how huge it is. This actually gets her really hot as well and the dare becomes a great excuse to show me how flexible she really is. Well, our medal winning champ actually does a perfect split on my hard cock and I proceed to fuck that shaved pussy deep and hard. By the time we're done, her whole body is a fully stretched cum fest.