Susan's brother and his daughter

We agreed that anybody in my phone who was at least 18 was fair game, and that we would not get mad at or judge the other person by who they chose. We counted to three and each blurted out a pic for the other person. Susan picked Steve, her brother, and I picked Leighjaye, Steve's 19 year old daughter.

We stared at each other for a moment, both clearly surprised by the other's pick. I will admit, I've jerked off while picturing Leighjaye many times, especially after the swimming party she had on her 18th birthday, which was the day my obsession with her had started. She wore a red, two-piece that showed off her cleavage and camel toe while perfectly framing her thick ass. I was already getting hard remembering.

But Susan and Steve? Did my sexually conservative wife really harbor fantasies about her own brother?

"Don't judge me," she said nervously.

"Same to you," I said as I pushed the proper buttons. I felt I my own body growing as I morphed into my muscular brother-in-law. His body was not all that was bigger. The semi-erect penis that now lay against Susan's leg put mine to shame even at full mast.

Then Susan became her niece, tall and pale with long, straight jet black hair. She was mostly flat chested and thin, but had sculpted abs and a thick, juicy ass. I was surprised and disappointed to see that her pussy was completely shaved.

"This feels wrong," she said but she was looking down at her brother's big cock. Looking over at Leighjaye, it was no longer semi-erect.