Stepson pleasuring himself without engaging in sexual activity

Our young and horny stepson has a bit of a problem, he can't seem to get it up for his stepmom. He's tried everything from watching porn to trying to bang her, but nothing seems to do the trick. He's been struggling with this for quite some time now and it's starting to become a bit of a concern for him. His stepmom, on the other hand, is more than willing to help him out. She's got a pretty big ass that he's been eyeing for a while now and he's been dying to give it a little lick. So, when he finally decides to do it, she doesn't seem to mind. He starts off slow, licking her nice and soft before working his way down to her juicy hole. He's not exactly the best at giving blowjobs, but he's got some skills. He manages to get his tongue deep down her throat, gagging her a bit in the process. After a few minutes of sucking her off, he finally pulls out and shoots his load all over her face.