Stepmom tries to teach sex but stepson keeps fucking the wrong hole

She had promised to teach her stepson about sex, and he was asking so nicely that she decided even though she was tired, she would give him a lesson. She was lying in bed already face down with her ass up so all she had to do was spread her ass cheeks and let him try putting his dick inside her, as a first step. And, well, he sort of succeeded......but, he got his dick into her asshole! And, well, he got the next step just fine, the fucking part. the sliding it in and out repeatedly. Still, she wasn't expecting to slide in and out of her butt hole! He had the wrong hole!! So, he tried again, and again, and again, and sometimes, at least, he got it into her pussy!