Looking for old story - please help

There is a story I’m trying to find that I read on this site years ago. I just remember the general plot of the story and not the name. A gay couple invite there fathers over to stay for a holiday. (I want to say maybe thanksgiving or Christmas) The two Straight fathers are uneasy about being there and don’t like one another.
The couple wishes there fathers would get along better and/or would understand them better. That night the two dads can’t sleep and are talking together in the kitchen I believe. Over the course of the night the two dads magically undergo mental and maybe physical changes. The two fathers now find themselves sexually attracted to one another. The next day the couple/ there sons are surprised to find the dads acting like there in love with one another. This is what little I remember and It bugs me I can’t find it.

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