You decide to interrupt her line of thought. "Actually, I've been wondering. Why don't we make this simple?"
"How so?"
"Just change yourself into something that I won't have to wrap my head too much around."
"So in other words, basic?"
"You don't have to make it sound so pathetic. Some guys like things to be easy."
"Okay. I'll try. But first, I need you to come over and sit on my lap."
"Sure." As soon as you take your seat, you start to feel the odd sensation that your body is getting smaller. And your girlfriend is starting to puff up. Her body is gaining pounds and bloating. Did you say the wrong thing? Is she going to punish you?
But wait! Her body is also developing curves. Sharp, sexy curves that make your cock stand up on end. And her body is suddenly soft and pillowy to rest against.
She holds you and whispers in your ear: "This is what you've always wanted. What every immature boy wants. An older woman who knows how to handle herself. Who knows the secrets of love. Feel my ass. Put your hands on it."
Indeed, her ass is big and firm and fills your hands as you try to grab onto it. Her big boobs poke you in the back of your head, the nipples perfectly erect. You lean back, and then you finally see her face. It has a few noticeable wrinkles, but also has the warm, comforting look a mother gives to her child. You feel safe, loved, and wanted.
"Young man, my body is like a fine vintage car: it must be carefully maintained. Put that young cock in my pussy and get to work." Her voice is deep and commanding. You carefully slide into her big folds and start to move. It's a strange sensation you've never felt before, and you begin to cry.
Seeing this, she hugs you. "My darling little boy, you did not tell me you were a virgin! Oh, how it must hurt you, to feel the inside of a woman! But do not worry. Mommy will help you. She knows what you like. Here."
She puts your mouth to her left breast. "Drink my milk. It always calmed you as a baby. Keep moving. Let your penis grow accustomed to the warmth of my body."
You drank her milk, and as she predicted, your cock slowly became used to the feeling of sexual intercourse. Now more confident, you started pushing in deeper and deeper.
"Yes, dear boy, keep going! I want you to release inside me! Do it now!!"
Semen shot out of the head of your penis and flooded her womb. Because it was your first time, you came not once, but three times, each more pleasurable then the next. Finally, you felt nothing else coming out of you and let your softening cock slip out of her.
The mature woman smiled, and then reached in to kiss you for what seemed like an eternity.
"My little boy, you did so well. I'm proud of you for being a man and filling me with your seed. Now, I will make a baby brother for you. Or a baby sister."
"Mommy, I don't ever want to stop feeling this way. My...
"Your penis, my child."
"My penis feels so good. Please, make it keep feeling good."
"You sweet, innocent child. I will make your penis feel good whenever you want. But you must promise me something in return."
"Yes, Mommy?"
"Promise me you will grow up and become a big, strong man. I want you to protect me and care for me. You will be my husband, and I your loving wife.
Not knowing exactly what that meant, but not wanting to lose Mommy's ability to make your penis feel good, you say: "Yes, Mommy. I promise."