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1.
A vow taken by a pornstar, that when she gets married, she will only do porn scenes with her hubby, usually a male pornstar too, and not with another dude.
"While Jenna Jameson was married to Justin Sterling, she never fucked another guy in front of the camera"

"Dude! That what I would call porn fidelity"
by Rosifaulds September 11, 2009
 
2.
1. unfaithfulness in marriage or relationship caused by the act of wife bringing home ass for the husband / boyfriend; threesomes, orgies. 2. belief of person or persons that marriage is not monogamous, boring or repetative.
My girl picked up a chick at the mall, brought her home and we had a threesome! That's Pornfidelity!

There is a website for an example. Wish your girl had that mindstate?
by Dahlan August 28, 2010