<human>: Give me a shortened version of the text

I have two dads. They have a mutual best friend named Zach, who my dad Vince has known since childhood.

Zach is very much a part of the family, and I call him Uncle. He's a fixture at holidays, birthday parties, get-togethers, or even just weekend dinner. Whatever I can't tell my parents, I tell him. He's never seemed interested in settling down, claiming we're "family enough" for him, nor have my parents ever expressed any worry over his bachelorhood.

Recently my parents celebrated their twenty-fifth anniversary with a huge party, where copious amounts of alcohol were consumed. My drunk aunt then confessed to me that Zach and my parents have been sleeping together since college, among other things.

I'm still barely registering this information. It puts a lot of innocent childhood memories, like how touchy-feely Zach is with my parents or even his relationship with me, in some weird context. I still love him dearly, obviously, and I think with some time I can accept his relationship with my parents, it's just the secrecy surrounding it kind of hurts my feelings a bit? I just want them all to be happy. I'm just trying to sort through my feelings, and if I should approach them about it, or keep it secret that I know.
<bot>: My parents have a (healthy) sexual relationship with their best friend which I just found out about. Don't know what to do from here.