Overeager stepson cums fast for stepmom

I've been having a very taboo relationship with my stepson for a while now. However, it's been a few nights since we had sex so he is super excited when StepMommy invites him into her bedroom. I start out by giving him a blowjob then getting on all fours so he can fuck me doggystyle. It feels so good and it's been awhile so he cums fast and shoots a nice big load all over StepMommy's ass. Could you have lasted longer with StepMommy?