It took a long time for Hailey and Allison to adapt to life as a reverse centaur after the Stranger combined their bodies. Two heads. Two torsos. Four breasts. Four arms. One waist. Two legs. They'd been best friends, and were now truly best friends forever.It was a lot to get used to living together as one body. Physically, their balance was off. Blonde Hailey controlled the legs while redhead Allison was attached behind, her torso tapering to join Hailey at the waist. Because they were connected at the waist, they shared every sensation below the waist. Every time their legs ached, anytime they had to pee, anytime either of them grew horny, they both felt it. There was embarrassment and disagreement as the two women adjusted to living separate lives together but they had to. There was no way back.As they'd grown more comfortable they began to experiment, Allison gently groping Hailey's supple breasts as Hailey slid her fingers inside herself and teased them both into a shared orgasm.There was also no shortage of guys interested in them and, two years after the change, they found someone they both loved.Now, after the date, Allison clutched Hailey from behind, her hands just below her soft breasts. They both smiled expectantly at Steve. Allison had a funny warmth in her belly and she felt Hailey's desire in their shared loins."I bet you've never been with two women at once like this before," Hailey grinned."Don't worry," Allison added. "We'll go slow."

A man gets taken over by a thing from another world that feeds off the chaos it causes from swapping bodies and body parts, transforming people, and then commanding them to enjoy their new forms. Enter the Stranger is too dark for Amazon and available only on Body Swap Stories or Smashwords. Preview here.
https://bodyswapfiction.com/enter/?p=13359