OK, I would seriously consider exploring reducing the geographical gap if you can.. it is VERY hard to fight an affair from miles away.

You DO have some advantages, he misses his kids, etc...

Is there a possibility of you moving down south with him later on? I think you at least considering this may warm up to him a bit.

Ya, do NOT ask about business partner. I really think you just need to educate him on this infidelity subject. WAY TOO MANY people think because they are separated its ok to sleep around. BUT, they don't tell their spouse about it for some "mysterious reason"... its because they KNOW they are cheating..

For some reason they think its more OK to cheat since they aren't under teh same roof.

I am PRO Protesting affairs outright, I am leaning in the direction of you just shutting him out entirely to see what affect that has... not sure yet... I mean the kids and eveyrone... ZERO contact...

This MAY invoke pursuit on his part...

If it does, if you did cut him out and he pursues you for a couple months with you pushing him away then you could throw him

LOSE THE BIZ PARTNER or you get nothing from your family - CLICK

But, given he's having some financial harship, you may want to wait til that runs out... you COULD invite him there if he's open to the idea... THAT will get him away from her.

I think you need to make him aware you are at least slightly OPEN to the idea of moving south.. he clearly wants that... so you need to show SOME warmth to the idea to get his attention.