He would not last very long, this was not about pleasure, but about the release that need to come. The last little bit of anger and hurt in his body to flow out. Jenn was just a means to an end.
Groaning, his hips thrusting hard and fast, barely giving Jenn enough time to catch a breath. Then something snapped and he came, thankfully only half inside her mouth. He groaned out his orgasm and then took a moment to lock his legs so he didn't fall. Then he was able to move back without falling he did and sat heavy on the couch, breathing hard.