To be honest Si although this whole idea should have needed to be discussed as a couple it sounds like you have no say in the matter as it seems your wife has made the decision for you so you either have to go along with it, or move on.
Seldom a good idea to stay together for the sake of your children, I've seen enough proof of this in the work situations, even very little children sense and know more than adults think.
I hope you can feel some clarity on the matter soon.

well worn subject..somebody trying to tell us how well open relationships work...aye that will be the day...mostly it's cowardice..people scared to dump/leave/abandon someone they have been glued too for too long...I know..been there...takes time to learn to live on yer own ..AND enjoy it...and I don't mean endless tottie...sites such as these are a Mecca for predatory men, who listen carefully to women who been through difficult time..so they fill in the blanks and bingo!..they have another "victim"..guess it's always been the way ..if only previous generations of men had Internet..lol...keep on trying...

An open relationship is never entirely open....one person at least feels compromised. If you want to be allowed to sleep around, first become single and then you can do what the hell you like! It's not difficult to work out. Neither children nor finances are a good enough reason to stay in a sham relationship.

My marriage is wide open because it did not work.

Well, perception varies but according to me, it can't work.

If the relationship gets boring, better be single & fool around.

some open marriages involves love with other people.. thats bullshit!!!

A very strong marriage doesn't need an outsider to enhance the excitement in bed.Love is just more than having love with multiple people.

Arrangements doesn't make marriage, but a togetherness makes arrangements.The presence of a third person in a marriage ironically means every thing's just over; the togetherness is broken.

You can call me dumb & backward but still, marriages unite two hearts forever, I don't think an "Open" marriage can actually work anywhere else than bed.

Doesnt it defeat the object of being married??

Why bother