Incest story where family get incest Christmas cards/newsletter then make their own.

[btpirg]

Subject tells most of the subject matter. But to expand I'm looking for a story where the mother and father sit their son and daughter down to discuss the Christmas card/newsletter/ letter they got from the aunt's family revealing the "truth" is hat they are all involved in incest. After discussing... And other stuff... They decide to tell the other family that they are ok with their lifestyle choice by making incest Christmas cards of their own w/ photos. Can't remember if I read it on literotica or another site or when I read it. (It had to have been in the last 3 or 4 yrs, but the story may be older. Hell it might even be new from last Christmas. Lol). Anyway thanx any help would be appreciated. (Don't know why this story popped into my head but it did and now I have to reread it or my ocd will drive me nuts. And I can't find it. Lol)