"Well, I wish you to be my own mom." you answer.
"Huh? Your OWN mom?" your girlfriend asks as she's confused. Come to think of it, you have always admired your mom as a young beautiful woman, and you always have some wet dream about her. However, you couldn't do it right in front of your own mother 'cause that would be so much trouble. But now your mom joins your dad to their honeymoon, you now have an opportunity that your girlfriend to become your own mom to have sex with, maybe something a little kinky and incest if that's okay. There wasn't much time to ponder this though as your girlfriends changes had begun. Since you both are the same age of 16, your mom was about 35, and your girlfriend seems to be aging as well. "Honey, I feel weird..." your girlfriend responds while she grew 4 inches taller than her 5'2" height, and all of her clothes are now vanishing to reveal her naked body. "AAhhh... I'm naked." she says as her hair starts to grow which was shoulder length and light blonde, was now growing a quarter way down her back, turning a deep brown, and appeared to be getting wavy. Next are her breasts, which increases a bit from E cups to EE cups. Along with her chest, her skin seemed to darken a bit from a tan, and all excess hair on her crotch are shaved. Her whole body had become more toned, as your mom worked out a little more than your girlfriend had. Finally, her face and voice both seem to contort and reform back to that of your mother's image. When the transformation was complete, the woman who is standing before you now was no longer your girlfriend anymore, but the perfect naked body of a beautiful woman you just happen to call mom. And then, you saw that her new clothes are appear in your girlfriend in your mom's body, a yellow blouse, a long brown skirt, a pantyhose, and a pink apron. And now, she's now look exactly like your mom. "Oh my, I feel weird, sweetie." your transformed girlfriend responds as she talks and acts like your mom too, you realize that you wish your girlfriend 'to be' your mom, not 'look likes' your mom, so that why she have your mom's memories and attitudes. "Geez, I think I better rest, would you mind if could help your mother out, sweetie?"