A man mistakes a teen's anus for her vagina and has anal sex with her, resulting in ejaculation

A man and a young girl are about to have sex. He's got his big dick ready to go and he's all set to fuck this 18-year-old amateur chick. He's got his mind on her ass, but she's got other plans. She's got her legs spread and her pussy ready for him. He goes in, thinking he's hitting her pussy, but he's actually hitting her asshole. She doesn't say anything, she just lets him go deeper and deeper into her ass. The guy's got no idea what's going on, he's just enjoying the ride. He keeps fucking her, getting more and more into it until he finally blows his load right into her asshole. Poor girl didn't even know what was happening, but she took it like a champ.