Good son: Tell her exactly what you were doing.
From Create Your Own Story
You toss off your covers and hop up onto your knees, giving your mom a full view of your exposed torso and hard cock. She freezes.
"Mom! I was thinking about you," you declare firmly. "I want to have sex with you. I wanna see your sexy body and I wanna please it. I wanna be the best you've had. So good you'll be thinking about me next time dad fucks you." You mom doesn't immediately leave after what you said. That's a good sign at least. You wonder if you might have said that a bit loud. Your mom closes the door and looks at your cock, visibly impressed.
"Is that for me, Tim?"
"Yeah," you say with an almost shy, goofy smile. You get ahold of yourself and go on. "I'm so hard for you, mom." Your mom walks over to your bed and puts her hand on your chest. She pushes you onto your back and turns away from you. You try to say something but she shushes you. She undresses. You see her lovely, round ass in all of its glory. As your mom pulls her shirt, you see her hips and back inch by inch. Your breathing gets heavy. You want to ask her to turn around but she seems to be ignoring you. She hops onto your bed and turns away from you again.
