Open Relationship vs Not.... BIG ISSUE

I bring up the cheating around, for one reason alone. This is what started the wheels in motion for me, to decide to get out of my marriage. It was already, rocky leading up to this one, very important night.

Can't remember, if I was very pregnant with my second child, or had just given birth, but this night, was the only night, I every made my then husband sleep on the couch.

Out of the blue, says to me, he's unhappy, wants to spice things up a bit and how about an open relationship, and maybe even go to Hedonism, in Jamaica. ((um hello?! ***h***, had I not given you everything, you ever needed in the bedroom?! Do I not give it to you sooo frequently?!))
It got me thinking, he'd already had a couple in mind, or at least someone in mind.

I swear, I broke his alarm clock, that night, as it flew down the stairs, along with a pillow and blanket!

My marriage, only got tens times worse, from there, when the 'cheating signs' began. Granted, this man was cruel and abusive, on top of it all. But I will never, ever, forget the night, he asked me for an open marriage.