A part of the family

 Dylan was sitting on his couch watching a movie, it was a very boring action one, though Dylan didn't care so much because he wasn't really watching it, he was just thinking about stuff, he kept existing this way for the moment until the phone rang, Dylan stood up from the couch and answered, his plain expression became a wide smile as he heard his girlfriend's voice through the phone's speaker.

"Hey Dylan!", "Hey babe, what's up?", "Well... My mom is making a special dinner tonight, and she wanted me to invite you, since she considers you a part of our family already, it seems you left a pretty good impression in here! I'm proud of you", "Oh, well... That's awesome! Sure, I'm coming tonight to have dinner with you and your family, or should I say my family now, right babe?", "Awww I love you calling them that way! Ok then, I'll see you later tonight!", "Bye girl see ya!"

Dylan was excited to go to the dinner, his relationship with his girlfriend has made him so happy, though he wasn't really excited because of the dinner, he was really excited to finally see his girlfriend's mom, Sharon, once again. Sharon was a buxom, curvy and sexy woman that happened to be the mom of Dylan's girlfriend, when he first went to meet her parents, he was amazed at the sight of such an amazing woman waiting for them at the entrance of the house, eventhough he still loved his girlfriend a lot, it's important to say that Dylan found himself very attracted to Sharon from the first time he saw her.

Anyways, the night fell upon Dylan, and he was driving to his girlfriend's house to have dinner with her family, his girlfriend received him in the entrance, and invited him inside happily, he entered the house and found his mother-in-law standing in the kitchen with a smile on her face.

Some minutes after Dylan's arrival to the house, they got to eat dinner, they exchanged some words, some laughs, etc., until the dinner was finished and they got to the living room to keep talking, and as the hours passed it got pretty late, Sharon and her husband went upstaris smiling in laughter, "I love this guy"- said Sharon's husband to her, Dylan smiled as he managed to hear that while they were going up the stairs, his girlfriend then invited him to her room to sleep together, he accepted and went upstairs with her. And after a marvelous night of ecstasy, both Dylan and his girlfriend fell happily asleep. Though Dylan would later find out why did Sharon considered him a part of the family...

Dylan laid in the bed as he finished fucking his girlfriend, he started to feel a tingle in his feet, though he didn't gave it a lot of importance since he was already very tired and quickly fell asleep. During the night, Dylan's body started to change, body mass started to come out of his body in the form of sweat, and only stopped until a certain amount of muscle and fat was left inside Dylan's body, then it started to change more, his waist became thinner and his body started to get an hourglass shape as his hips became wider. 

Dylan's limbs started to get a toned form with the body mass that was left in them, making them look more feminine, including his hands and feet, which became more delicate and petite. After that, his ass started to expand, more and more until he had a nice and comfy cushion to seat on, and the fat that was left from that moved up to Dylan's chest, expanding it too as his ass did, until two 34DD sized breasts formed, his nipples expanded too, the areolas became wider as the nipples themselves got very erect. Then his penis started to shrink as his testicles retracted into his body, forming both a clit and ovaries, he then grew vaginal lips to end the growth of a fully functioning vagina. Finally, Dylan's face shifted, changing slowly in a tingly sensation until he had the face of a mature woman. The end of the transformation woke Dylan up early in the morning, around 3 a.m., it was still dark and the moonlight was giving a faint lighting to the room. He needed to go to the bathroom and felt concerned when he couldn't find his cock down his crotch, he decided to turn on the bathroom's lights, finding himself horribly shocked at the person he saw reflected in the mirror, looking back at him.

Dylan was confused, he just trasformed into Sharon, his girlfriend's mom! But... he appeared to be himself, as Sharon, not just her, he could see this as the makeup, hair, and outfit did not fit Sharon's style at all, it was like, just his style, but feminine. He cupped his new boobs in his now dainty hands, and poked his nipples, he let out a slight moan as he felt the new kind of pleasure that just a woman could feel, he was close to now get to touch his new pussy until he snapped out. He was in another body and he needed answers, so he decided to return to the room and wake up his girlfriend.

"Hey, babe... wake up, please", "mom..."  his girlfriend replied  "Why do you call me baaaa--"  she found herself disturbed at the sight of such an outfit, "Mom, what's happening? Why are you dressed like that?", Dylan sighed, "First of all, do not call me mom, and second, I am Dylan, I transformed into this body, what the fuck happened?", "Oh no", she said, "What? what's happening?", Dylan said concerned, curious and scared of the answer, his girlfriend replied, "We need to talk to mom".

Dylan and his girlfriend woke up her parents, who quickly got dressed and went downstairs with them when seeing Dylan's new body, they all sat terrified and concerned in the living room, all of them ogling Dylan, who felt very uncomfortable and exposed. Sharon then explained all to Dylan, with her husband and Dylan's girlfriend scared of his reaction. Sharon explained, she is a were-woman, or at least she was, she got infected through having sex with another were-woman, and expected her now husband to suffer a fate like that when she fucked him, but instead, it didn't happened, they decided to not worry about it a lot and expect that the mutation didn't get in any of their descendants, but it appears it did.

It seemed that Sharon's daughter got the were-woman gen, but she didn't have any symptoms because she was already a girl, probably for the same reason, and when having sex with Dylan, he got infected, and got the looks of Sharon, it isn't reversible, but at least he also appeared to not have any trace of the uncontrolable lust that Sharon and the other were-woman had in their times as women, this only meant that Dylan's change was permanent, and that he was now a woman forever, a copy of Sharon, his girlfriend's mom...

This is Dylan now, three years later since his transformation, now his new name is Teressa, and she is passing as Sharon's twin sister and her ex-girlfriend's aunt, Teressa is now a secretary working for a big company, and eventhough her salary isn't as big as her co-workers, she still earns a lot of money, she lives in her own place, and is regularly visiting Sharon as she is now a part of the family.