The Great Shift had been good for James and Emily, in a way. They ended up in the bodies of the mother and son they'd each been obsessing over -- she over the son, he over the mom. Although the shift had put them in the bodies of their obsessions.
James was still thrilled to watch his new body move, to cross his long legs, to admire the sway of his breasts, at the time Emily sat him down for a talk. They'd been living together with their former bodies for a few weeks while the world sorted everything out, thinking it best to stay close to their original forms.
"Look," Emily began in her deep voice, "I don't think we're ever going to shift back, so we might as well enjoy this."
"What do you mean?" James laughed and tossed his golden hair back, though he had some idea.
Emily put her meaty hand on his thigh and kissed him on his soft lips. James's body warmed, his pussy moistening easily for this young stud, even though it was this body's son. Emily soon had James bent over the couch, his tits swaying back and forth as she plunged into him, over and over. God, her cock felt so good in this middle-aged body, and he howled in ecstasy as he shook and came.
Emily's old, ugly body came upon the two as they were in the throes of orgasm, but they ignored her as Emily grunted, spurting her hot seed into James as he sunk back as far as he could, yearning for his body to be utterly and completely filled. The hot heat of Emily's cum was divine, and he grabbed his tits and moaned.
It became a common sight in the house, as Emily took James whenever she felt the need, the cock of the son perfectly fitting into the mom's wet pussy.
A demon builds his power by possessing people and changing their bodies and minds to suit his needs in The Devil You Know, on Smashwords, Amazon or wherever ebooks are sold. Preview here.