Judy followed Samantha to the changing room. They entered both and Judy removed her bikini to show her firm C-cup breasts. Her nipples are already erect in anticipation of what is to come. She took her brother's trunks and put them on.
The moment the trunks came into place Judy's breasts started to shrink. Passing B and A-cup size they finally vanished totally leaving her wioth the flat chest os a young man. Her hair shortened and her face became masculine. She also felt a grwoing sensation in her crotch where a penis and testicles formed. She grew somen inches from her old 5'8 size to a height of 6'4. Her whole body bedame that of a young guy of 18 years.
"It really worked", Judy - now better called Joe - shouted with a deep mascculine voice. "So now back into my bikini as I don't want to stay like this."
But Samantha didn't want that handsome looking guy to disappear. Waves of female feelings run through her body and she wanted desperately to be screwed by this guy. She felt her vagina becoming wet in anticipitation.
"Wait!" she cried. "You should find out what you can do with your new equipment. I am ready to helop you with this."
Samantha dropped her bikini and started to pull down Joe's trunks. Before Joe knew what happened he stood naked in front of Samantha. Samantha knelt down to give Joe the first blow-job-experience of his life. The she placed herself on the floor spreadinmg her legs. She told Joe to come and directed his penis into her vagina. They found a common rhythm very soon and climaxed in a great orgasm.
"That was great", Joe panted.
"Why don't you stay male as long I have to be female?" Samantha suggested. "I can't change back for a reason that I don't kno. So if you remain male we can be together and have sex whenever we feel it would be good. Otherwise we can only be friends as I don't think I am lesbian and you are also not."
Joe agreed and they started a life as a teenage couple. Both adjusted slowly in their ne roles. Soon it became obvious that Samatha was pregnant. So they finally decided to marry and raise their kids together.
In some remote place an old man with a long white beard had watched everything in a glass orb. The smiled and removed the spell from the changing room.