It has been such a long day. All I want to do is change into something more comfortable, sit down in my favorite chair, and relax. Awwww it feels so good. Then in comes my son. I can tell he is surprised to see Mommy sitting here in her lingerie. But obviously pleasantly surprised judging by the growing bulge in his pants. I've been noticing lately how my son is growing into quite the man. And as naughty as it is I can't help but fantasize about him quite a bit. So here is my opportunity to make it more than just a fantasy. I gently tease him about being turned on by Mommy and how her big beautiful breasts look in the sexy lingerie. It doesn't take long before he and I are both stripping down and masturbating together while I give him jerk off instructions to cum for Mommy.