Preston is a late teens-early 20s appaloosa/draught stallion and the younger brother of Penelope. He considers Penny to be his girlfriend as well.

Preston enjoys having secret sex with his mother, Biscuit, and is unaware that his father and sister actually know and are turned on by them. Biscuit is madly in love with him and Preston is unaware that their sex isn’t just taboo, but Biscuit’s lifelong fantasy.
Preston and Penny both enjoy sex around the house and in public, often making Penny’s boyfriend, Silver, either watch or join. Preston is bisexual and has only ever penetrated Silver once, but would like to again.