I feel for you in having to do that conversation with your kids. I will put that down as one of the most difficult things you will ever need to do. My W was the same , left it to me to break their hearts. The comment about it not being the OM , I got this , that it was over before OM . Thats BS , I know we were in trouble but the minute they bring another R into the mix and make the decision to pursue that rather than to try and work on thier own M is wear the mistake is made. Then they delude themselves into justifying what they have done. I am saying this not to poke a finger at the WAS but for you not to buy into that line of thought. Do the best you can for yourself right now , be the best person and father you can be given the circumstances. If you can wait out OM then there may be an opportunity down the track. Right now any pressure will do no good.