Leaving her other two siblings with each other genitals, at least for now, a grinning Danny was about to maybe involve himself in a swap with Kourtney, but his mobile phone ringing soon put that off. Sporting his own boner after swapping his family's parts around a little, Danny answered his phone, knowing it was his mate Rick. "Yo, what's up?" He said, while watching Kourtney walk into the kitchen, stil adjusting her package.
"Hey dude, you wanna hang out?" Rick asked, cutting straight to the point as he always did.
"You can pop around here if you like first." Danny agreed, inviting his friend over. "Gazza available to hang too?" He inquired, while continuing to admire his now shemale younger sister. His dick pulsed with excitement.
"Nah, his mother has him helping her with something." Rick replied.
"Shame!" Danny chuckled.
"He's a mother's boy." Rick joked. "A fucking pansy."
"Well, we can hang, so get your tubby ass over here." Danny said, making fun of his friend's weight as he often did. Rick didn't mind though as he knew his friend was only joking with him. He hung up and started making his way over to Danny's house. Danny meanwhile, followed his younger sister Kourtney, who was still unaware she now had Kurt's junk between her legs.
"You stalking me?" Kourtney suddenly blurted out. "I mean I know I'm gorgeous, but when my own brother thinks so... creepy!" She chuckled.
"Not stalking, just thinking, that's all." Danny shrugged.
"Yeah, I could hear the creaky cogs turning from here." Kourtney laughed at her brother's expense.
Danny frowned, then smirked. A seconds later, Kourtney's perky C-cup breasts deflated under her top, only to sprout from Danny's own chest and nicely distend his t-shirt. As they did so, he felt his cock throb again in pleasure. As for Kourtney, she now lacked any primary female characteristics, she had the genitals and flat chest of her two older brothers. And still she remained unaware. This was so cool to Danny. Another quick swap later and Danny was also wearing Kourtney's bra, since she had no use for it anymore.
Walking away from his still arrogant sister, Danny grinned as he groped and squeezed his new tits, loving how they felt. His new nipples were nearly as hard as his cock was. He was definitely glad he had started out using his power on his family. They were the perfect 'guinea pigs'.
Danny now had to keep himself entertained some more while Rick turned up.