pedicest 

When a pedifile does incest

Man that 50 year-old pedicest fucked his 18 year old niece !

pedicest by Grapes Are Cool May 2, 2007

Pedocest 

Sexual interaction with an underage relative.

"I've slept with my sister."
"Isn't she 12?"
"Pedocest is so hot."

Pedocest by desolateexistance July 6, 2009