"This is really hard to believe." Meg said
"Look, I'll show you that how it works." Erika said. Then she removed her shirt and sprayed on her chest. Soon, she felt the tingling sensation on her chest and her breasts grew to a Dcup. As her breasts stopped growing, the tingling covered her whole body, she grew up a little. She opened her wardrobe to look into a mirror that was insside it and saw that she was older. She looked to be 19 years like her older sister.
"This is incredible. You have to let me use it too." Meg asked.
"You are free to try it" Erika said
Meg took off her clothes and sprayed it on her crotch. But what happened to her was different. Meg just became older. But she felt a tigling in her pussy and an uncontrolable urge to put something there, she promptly put three fingers in it. But soon it wasn't enoungh and she had to put another finger.
"You are really enjoying it." Erica said when she saw Meg insert her hand completely in her pussy. In a short time even a whole hand wasn't enough anymore and Meg had both hands inside her.
"No way, How is it possible that with two hands there it seems that something is missing?" Meg asked looking to Erika, that was now sitting on the floor playing with her cock. Meg then had a crazy idea, she went to Erika and turned around.
"You want me to pleasure you too Meg?" Erika asked. But Meg didn't say anything, she just grabbed Erika's head and it agaisnt her pussy. Surprisingly, Erika's head went inside.
"Finally, this fells sooooo good." Meg said as she kept moving until she finally came. She stayed still for a minute, then remembering that Erika could need to breath, she tried to walk off, but when she did it, Erika was pulled together.
"Oh no. Don't tell me that your head is stuck." Meg took her hands to her pussy to help Erika, but her pussy was nowhere to be seem, her body and Erika's had melded together. "Erika, please, tell me, are you OK?" Meg asked
Erika was conscious and made a sign with her hand. This is when things got weirder.
Firstly, Erika's breasts moved to Meg's body resting just below her own. Then Erikas arm's moved to Meg's crotch and changed into a pair of penises.
Then Meg noticed that now she could fell Erixa's body as part of her own. She looked behind to see what was happenig and saw as Erika's body changed into a horse and a tail grew above her butt.
Meg looked at the mirror to and saw that that had turned into a centaur. This is when the last changes took place. A small bump appeared on Meg's right shoulder, then her head move to the left. Then the bump grew into a second head, this one firmed into Erika's head.
"Ahhhh.. Finally I can breath again, what just happend?" Erika said
"I'm glad you are OK. I really feared you dying." Meg said relieved.
"Now we are really inseparable friends." Erika said