Why not?

[Thinker]

I think I am figuring it out in my case. Think about it for yourself: the romantic part of your R with H is dead, gone. For now ignore your hope that it may come back, and assume it is not going to.

So what is left is a strained friendship with a business partner. You have to work together to raise the kids and coordinate finances, and you want things to stay cordial, so you will treat them politely as a guest, but that's it...

So how do you act whan that person comes to visit?

Friendly, welcoming, professional, polite

But romance, sex, etc would never even enter into your mind...

Not even a consideration!