"Rina, come in." You say as you put Becky down, Rina enters and closes the door, awaiting instructions just like Becky who now watches the two of you from the bed, eager to see how you will change Rina.
"Okay Rina, this time we'll start off with the physical changes, I'm gonna need you to strip completely naked." You command, she nods as she removes her hoodie and shorts, leaving her bare before the two of you. "No underwear? naughty girl." Becky remarks, biting her lip.
"Okay Rina, this might hurt but I need you to grow in height, to say, five-six."
Rina spreads her limbs like the vitruvian man and flexes her entire body, you catch a good look of her firm and toned backside, a combination of excellent genetics and hard work in the gym, you hear faint cracking sounds and Rina appears to wince as you notice her actually increase in height. Becky even seems shocked as Rina now stands at 5'6 tall.
"Very good Rina, now... I want your chest to become that of a muscular teenage boy, lose the breasts and build up muscle across your arms and pecs." You don't see but Becky looks at you with a devilish smirk, knowing exactly where her kinky husband is going with this.
Rina flexes her arms and looks down at her B-cup breasts, as she flexes and grunts they quickly recede into nothing and her arms and pecs bulk up slightly, giving her the appearance of a very flat-chested female athlete. Becky begins licking her lips and lightly squeezing her left breast, clearly enjoying the show.
"Now Rina, it's time for you to become a man. Turn you clitoris into a thick, 7-inch cock, and your ovaries into a hefty pair of golf ball sized testicles." Rina begins flexing but the sudden pain causes her to fall to her knees, still you can see between her juicy thighs a large cock emerging from within her, the wet squelching sounds causing you and Becky to become very aroused. Rina then begins grunting as if lifting weights, more squelching sounds are heard before a loud moan beams from Rina's mouth as a large scrotum falls out from inside her, she-now-he stands to his feet and stares at the two of you blankly, his cock is thicker but not longer than yours, but his new balls dwarf your own, dangling like grapes from a vine. Becky stands up and circles Rina, inspecting the new femboy.
"Wow babe, he really is something." She remarks, she grabs his balls and looks back at you, shocked at their size. "What are we gonna do with him now babe?" She asks.
"Okay Rina, To finish off I want your hair to shorten to shoulder length, your lips to plump up, your voice to deepen into a husky androgynous tone and your asshole to expand in size and self-lubricate, also make your new prostate extra sensitive."
Rina extends his arms once more and flexes, the changes this time are more minor and all happen at once without effort, you have now turned Rina into a perfect androgynous femboy.
"Perfect, now you are my and Becky's boyfriend, you will wear breast forms in public and put on a fake voice to trick everyone into believing that you are still a woman, but only we now your little secret and we love you for it. now c'mere"
You throw the amulet onto the bed and you and Becky pounce on your new toy, as Rina snaps back to reality he immediately begins returning your kisses and grinds his new assets against you two, before long the three of you find yourselves eager for your first fuck in your new home.