Erika turned to her mother realizing that she had been caught out however she has still got room to move. She eyed her mother with an appreciation for her own DNA and the figure that she would grow into. But her mind had been twisted by being her sister and then her brother, impregnating Marcy had led to something changing in the way in which her brain worked, Nathan's memories or Nancy's experience of men. Things that she didn't understand but now did.
Her Dad William had had a operation so that he couldn't have any more babies and her mom wanted one more child before she passed her child bearing age. A baby sister or brother for Erika. Erika started walking around her mother and noticed many of the things that she knew about herself. She took in the fact that her mother was 41 however she was a real MILF. Not some woman over 30 who would never have children. She was a real mom with real kids.
Her breasts were sagging but still drew appreciative glances. In her shirt you wouldn't notice the extra junk in her trunk either. Lily looked nervously over her shoulder as she tracked her youngest daughter.
"So you want another baby?"
"That is none of your concern." Lily gasped.
"Well if I am to have a baby sister I need to help you get pregnant."
Lily felt her nipples harden.
"Y--Y-You can change into men? Into your father?"
Erika thought through the logistics of the matter.
"If you get me an item of his clothing, before he had the operation I should be able to do it."
Lily disappeared and came back with a pair of briefs.
"When I first met your Dad I felt like a teenager, the sex was that good."
She didn't expect to have this conversation with her daughter until she was much older but whatever was happening to her youngest was working it's magic on her.
Erika reached out and held it in her childish hand.
"This will work however it isn't strong, might take some time. I give you what you want another baby and you leave me alone."
Lily bit her lip.
"When can you turn into William?"
"Give me 5-10, I should know."
"Do it."
Erika wanted to turn into Emily again before becoming her dad.
She closed the door and pulled on Emily's oversize bra and panties and sprayed them with the salve.
She pulled on a shirt and jeans. Hazel was like her, a bitch and she would make men wait hours. Erika liked becoming her slowly. Hence the time she had requested from her mother.
Lily had pulled on her favorite matching set of bra and panties she had once gotten for doing a lingerie shoot after meeting William. He had loved her body so much that this is what had led to her third child that would become Erika.
After a minute Erika doubled over. She grew two inches, feeling herself lift off the floor with another two inches. The bottom of her jeans were riding up the length of her thigh. Then her shins. Her ass grew and so did her hips expanding the width of her jeans. Her shirt started riding up her stomach exposing her belly button. Her hair started darkening to brown and then to the fiery shade of red that Hazel had. Her shoulder length hair started to run down her back. Soon she was a foot taller than when this had begun.
As her thighs thickened and grew with womanly muscle the jeans started to rip and tear in places. Erika grunted with the effort but she embraced the change. Hazel was her favorite body so far. Her budding breasts were pushed forward as her chest expanded. She grabbed her growing tits. Her boobs were first nothing of note but soon they grew rounder, fuller and filled out the cups of Hazel's bra. Hazel threw her head back as she moaned with her growing breasts.
Outside Lily had her hand down the front of her clit she was feeling the beginning of an orgasm building. Lily had been exposed to the salve, having seen the transformation she was now picking up the emotions and hormones flooding through her daughter's body. This affected her own body. Her sagging tits started to regress in age. Going back to when she first met William. Solid perky and full 32C cups that had made her such a fucking good find for that man, he never appreciated how lucky he was. Her thighs tightened back to the age of 31. Her face became free of lines as the paunch in her belly tightened into a toned stomach.
Erika felt her hands grow, even then her tits were too big. Her jeans had multiple rips in the fabric, the button had popped off and the zipper had busted, she stepped out of them. She imagined herself as a Hulk as her tits grew through C to Daisy Dukes and tore her shirt clean in half.
Lily heard her daughter's voice, no longer the whinny daughter becoming a teen but a husky voice like that redhead in Who Framed Roger Rabbit?
Hazel stepped into the hall and saw Lily looking 10 years younger, at the peak of her beauty.
"Perfect" Hazel purred "the only thing you need is a good fucking, right?"
"Me so horny baby," Lily said from that famous movie "me love you long time."
"Good, let me change and give you what you want."
Hazel stepped out of her bra and panties. Allow herself a glance at her bare breasts, the goddess that she had become again. With something approach regret she pulled on Williams boxers and applied the salve.