Joe woke up a bit later, a tiny (and devastatingly cute!) girl laying across his body, snoring lightly. He reached up and stroked her hair...it was so soft...
She stirred and looked at him with big green eyes. "Oh Joey...that was better than you Dad, even."
"Uh, thanks. I mean, I'm glad you liked it."
"Liked it, I loved it! I can't wait to do it again! Oh, but...I want to see what I look like!"
"I wish there was a mirror on the ceiling." He pointed upwards.
Emily rolled onto her back, still laying on Joe's body. Her crotch was positioned just above his cock, and he could see it rising at the sight of her on top of him. She stared upwards, her mouth forming a tiny 'O'. "My..goodness...I'm a child!"
"Uh, yeah, but you're really cute."
She smiled. "Yes, yes I am. Oh but I can't be your mother anymore, I'm way too young. I look like your kid sister!"
"I wish that everyone would still treat you like an adult...unless you want to be treated like a kid. I wish you still had your job and all your rights and stuff. And I wish that you were my girlfriend and nobody thought there was anything wrong with that."
Emily shivered. Again, there were no physical changes, but something important had changed. "Oh Joe...I love you." She rolled on her tummy to face him. "But...with that last wish...I'm not your mother anymore."
"Uh..wait, will that mean I'd disappear or something?" He suddenly felt very frightened.
"I don't know! Quick, make another wish!"
"Okay okay...uh...got it. You are still my mother, you suffer from a rare medical condition that only a few females are afflicted by. Like, one in a thousand. It's well known and documented, but not treatable. The condition keeps you from ever going through puberty or aging, though the victims have crazy sex drives. There are no other side effects, otherwise, these girls remain pretty and cute all their lives, but are in perfect health. I wish that even though you couldn't carry me to term, you were able to get pregnant, and the foetus was removed harmlessly from your body, and medical technology allows such children to grow up to be perfectly healthy."
Emily put her hand to her temple. "Oh...ow...new memories...oh. Oh! Yes, you are my baby! But they had to take you out of me before you got too big for my tiny womb. I still was able to do everything else a mother can do for her son. Thank you, Joey, that's perfect!"
Strangely, Joe didn't gain any new memories. "And somehow it's okay for you to be my girlfriend?"
"Oh well, that. Even though Dahl Syndrome only fully affects girls, it's passed onto their children, and their boys develop more slowly. You're actually 18 now, even though you don't look it. And yes, incest is now legal and acceptable as long as both partners are adults, and, for social reasons, at least, there isn't a huge apparent age gap. As someone with Dahl Syndrome, it's perfectly fine for me to be in a relationship with someone who looks older than me."
"Wow. I can't believe it, I've changed the world just so I could bang my Mom."
Emily giggled. "I should be upset with you, but I actually think this is amazing. But...I was thinking...as great as sex with you is, it's still not the best sex I've ever had."
"Oh...really? I mean, I'm new at this, but..."
"Oh it's not that, honey. It's just...sex with a girl is even better."
Joe swallowed. "I...oh you did say that...uh..."
Emily grinned. "And now you're thinking you want to see me with another girl. Well, we can do that. But I want you to roll this idea around in your head. Not now, but at some point. Use your ring to become a girl, and we can have some real fun!"