After they had sex Luke was laing beside Sarah and his dad. While he was sleeping Sarah and Luke's father felt something strange in their body. "What's happening ?" Sarah asked. "Something is not right" said Luke's dad.
Their body started to change, their skin colors started to change color into mix of Sarah skin and Luke's father. The Luke's dad side starts to change into more girly, while Sarah side starts to change more manly. In their crotch next to Luke's father cock, Sarah pussy appeared.
"I don't know whats happening, but I like it." Sarah said. "Yes this feels good." Luke's father agreed with Sarah. "So Mr. Rogger's are you ready for little fun?" said Sarah to Luke's father, he smiled and answered"How could I said 'no' to you."
After a while they start to enjoy their body, and trying to not wake up Luke. They felt great shared pleasure as Sarah stroke Luke's dad cock, while he played with Sarah pussy. While they moaning from pleasure, their heads starts to getting closer and closer.
And then, when they lost themselves in the pleasures, their heads started to merge, mixing every aspects of them. While they climaxed their fusion was complete.
"Whoo what a rush" said voice that sounded like Sarah and Luke's dad in the same time.
"Wait, why I sound like that, and where's Mr. Rogger's?"
"I here and where are you Sarah?"
"Here, wait,what's happened, we need a mirror"
As they stand before a mirror, they seen their fusion face. They looked like perfect mix of them both, it looks feminine but also masculine in the same time.
"Wow, it looks like we fused together, and we looking great." after they said that they could feel getting hard in their crotch. "Well that will take some time to get use to it, but we or rather I think, I will stay like this for a while."
They just can't wait for Luke reaction when he will wake up.