I just finished making dinner, and go to let my son know. As I'm talking to him, he is acting strange, and is laying in bed way to early in the night. I look down and see my missing panties on the floor. I pick them up, and yup, they are covered in dried up cum. I take my son's blanket off him and he is naked. OF COURSE he has been jerking off to me. He has a girlfriend, and still chooses to jerk off into his mommy's panties. At first I am disgusted, and mad, but then, well... It's flattering. I tease him while I play with his cock, eventually giving him a sloppy blowjob. After I while I really want him to fuck me, but, it's so wrong I can't let it be in my pussy. So to solve my morality issue, I let him fuck my tight ass. He hurts at first, but luckily he cums fast. He blows a giant load all over my asshole, and then I hop up.. Make him promise to not say anything and then go and finish preparing dinner.