Keep dreaming those wet dreams. In short no, and with her attitude/personality it will probably be .50 before he even gets a handjob. And probably won't even appear in the next few updates at all, she's still on her way back from the boat (probably walking after the car broke down with no AAA, if she didn't get killed off or something). Unless the mom is the only LI they are usually the last to get fucked by their son in AVNs, if it ever happens at all. Even in sandboxes you usually have to advance other LI paths before the MC gets to fuck his mom (ie The Awakening, currently a rework mess that I hope gets cleaned up this year). Unless the MC is the mom like in Project Myriam or something (which gets old quick after you've seen her get fucked by not just her son and 20 other schoolboy crushes and fuck boys, but her dog and horse too, even if she is a hot natural blonde).