Hi Simon
you sound a very decent bloke (with issues!).
i think if you could have your new partner, see your children as often as you could, but also knew your wife did not have a partner, all would be honey.
but life is not like that!
i stayed i a miserable marriage for my girls - knowing that when my youngest was at high school i would leave. and this is what i did, although my X precipitated me divorcing him.
he was a crap hubby, but a remarkable father, nothing was too much for him as regards the children.
he had cheated on me when my first daughter was new born and to be honest if he had done everything he could to have made the marriage work I would still be married to him now. but he became very controlling and possessive and the reason was(although I didn't know at the time) he had had other sexual relationships even when we were going out and more than one around the time out daughter was born.
you see (found out from counselling prior to me divorcing) because he knew he had had these sexual relationships he lived in fear that I would do the same and it changed his personality to become this person who didnt like me doing anything without him.
if you went back to your wife do you think you would trust each other again? i think the answer will be 'no'. but love conquers all. therefore, only go back if you love her, because if you don't you will only be bitter for the rest of your lives together and the children will certainly suffer then.
the other alternative is to go to
mediation together. talk, talk, talk. 3 children alone is soooo soooo difficult. maybe that is why she hooked up with another bloke so quickly. maybe you could assure her that you will be around as much as she needs for the chidlren. at the end of the day she may have got this chap simply for a helping hand and that's no good for the kids or her.
you are in a difficult situation. divorce is traumatic - costs money - and you will have years of paying out whilst perhaps maintaining another family. do you think the OW would be able to tolerate you paying out so much money every week and also seeing your first family regular.
i honestly feel for you i really do because I can tell from your posts how much you care for your children.
Jo x