Scenario (Touching reunion with son)

You give us the following backstory for her arrival: Instead of looking for her husband, she's been looking for her son (you) ever since shortly after you moved out, because as much as she tried, she couldn't fight her forbidden urges any longer. We gave her your address and a suitcase filled with sexual paraphernalia and lingerie you requested, as well as a trenchcoat to conceal her signature outfit from the public eye on her way over to you.

Several days after you ordered, we drive her up to your street and she finds her way to your door. When you open it, she hugs you and is overwhelmed with joy. Her breasts press against your face.
"Oh I'm so glad I found you! I should have told you before you left, but, I'm in love with you son. Not just as my son but as a man. I couldn't give in to your advances before because I had to be a good mother." You think about how you can fill in the blanks about the nature of those advances in later conversation. "But when outgrew the need for me to care of you as a mother, it wasn't long before I resolved to take care of you as a woman. Please accept me back into your life."

As she starts getting emotional, you cheer her up by taking her hand and rubbing it against your crotch. She feels that you're fully erect. "Oh my precious boy, I mean, man. You still desire me the same way. You've made me so happy. Let me make you happy by taking care of this for you." She takes off her coat, showing off her impressive sideboob, then gets on her knees.