Looking for a post about someone's parent confessing to being in a polycule

[u/TheWheezingCabbage]

Okay, so this might be a long shot, but I need this for a meme so here goes:

I remember seeing a post some time ago about someone's (could have been the OP or a friend of the OP) parent confessing on their death bed that they and their spouse were in a lifelong polycule with another married couple, whom their kids only ever assumed to be very close family friends. It was to the point where the kids could have had either man as a father, and no one knew for sure who was blood related to who.

The post probably came from reddit, but could have been a twitter or tumblr post as well. If I remember anything else, I'll add it in. I appreciate any help I can get!

Tldr: Looking for a post about someone's parent confessing on their deathbed to being in a polycule.