"Let's fuck," Ty agreed.
"You'd better change us, though," Rebecca pointed out. Nodding, Ty used his power and both of them felt an irresistible surge of hormones race through them, urging their bodies to reshape. Feeling herself grow more muscular, Rebecca tore off her sundress and bra and helped Ty pull off his shirt. Ty's heart raced as he noticed her muscles physically ripple in her arms and chest, and she forcibly pulled off his jeans.
While his hands rubbed her firmer, larger torso, Ty felt Rebecca's larger hands rub and grab at his swelling nipples and whimpered with pleasure. As her soft chest started to recede to pecs, his had started sprouting, and they seemed to change in sync with one another, his breasts growing a cup size as hers shrank one.
Both of them could feel their genitalia had started to change through their underwear, and swiftly took each other's off. "Don't even think you can stick that inside me," Rebecca purred as her clit rubbed Ty's cock. With their bodies out in the open and making contact, the big changes started- Rebecca's slit sealed up and Ty's balls moved inside him. As Rebecca rocked her hips on Ty's rapidly shrinking cock, her hip thrusts were accompanied with her balls emerging and her clit widening and lengthening to a 7-inch cock.
Under her, Ty's cock had started to be tugged inwards, becoming a small sensitive clit, and his scrotum had opened into his vagina, moist and aching to be filled. Taking advantage of her masculinized form, Rebecca put her hands around Ty's neck, rubbed her head along his new lips and purred, "you want me to fuck you, don't you?" As soon as she saw Ty nod, her length pushed deep inside him.
Rebecca railed Ty eagerly, her hips pounding his, her balls slapping against him, her hands either holding his neck or breasts firmly the entire time, and her pants and grunts being accompanied by high-pitched, feminine sounds of enjoyment from Ty. Before long, she came hard inside him, and the two of them hugged tightly, kissing passionately as they came down from the high.
But something very weird had happened because of their fucking...