Looking for story - bursts out during sex

Story by Betterthenlife

I imagine this is a long shot but I figure if anyone can help it will be this forum. 

I have been trying to find a story I read a while ago and was wondering if anyone might know this story. It involves a guy and a (futa) girl who start seeing each other. I think they go to school together. Before a home date the girl accidentally sends the guy a photo of her wearing yoga pants or similar showing off a huge bulge and is embarrassed by it. The date goes ahead and the two start making out before having sex. She get him to fuck her from behind and while being fucked her cock bursts out of her underwear. She is embarrassed but he loves her cock and ends up jacking her off from behind. They then talk about how big she is and whether he likes the fact he has a bigger dick than him. 

I think I read the story on literotica. 

Again, know it's a long shot, but if anyone know the title I would appreciate the help!