I've said it before - you are fortunate you have a child ( although not really a child any more ) who is old enough to make rational decissions.. Another thing - Your Daughter will have a more rational mind / make sounder decisions than an WW.. WW act on emotion, hence their reality and decisions are just crazy.
You have nothing to discuss with WW.. Let the solicitors handle the divorce / assets when it comes to it - protect yourself and your Daughter..As per above, WW make stupid emotionally fuelled decisions - Boob jobs, holidays, clothes etc.. - Protect you and your daughter !
As for the whole "last 2 years" thing - look up Monkey branching. and while you think about that, consider than Plan B scenario... Affairs rarely last. You are a solid plan B for WW ( and most WWs ) - Is this what you want ?
Previous username - Helpme123.. A name chosen at a desperate time..
Now Mr Brightside.. coming out of my cage, and doing just fine.
