My kids will eventually learn why I left their father, and that day will suck

I have two kids, DS8 and DD9. I left their father when they were 3 and 4 because of his third affair. He is now engaged to the woman who was his mistress. Our divorce was less than amicable, but we hashed things out and have gotten to a point where we co-parent pretty well and are at least polite and sometimes friendly towards each other.Our children do not know the real reason for our divorce. They were far too young then, and they're still to young now. They know that their dad and I fought a lot, and we've been very general when they ask why we split. Things just didn't work out. Sometimes certain people just aren't meant to be married. All the trite responses. They've pretty well accepted everything, and though they miss seeing their dad more, they love him and look forward to their time with him.Here's the thing: the reason for the divorce is not a secret among my family and friends. I have no idea what my ex told everyone. Eventually, my children are likely to find out the real reason I left. I suspect they will be really, really mad at their dad, and possibly at the woman who will be their step mom by then. I'm not planning on telling them myself, but once they're old enough, I don't plan to lie to them if they ask me outright.Anyone who's been through something like this, as the person who left, the person who cheated, or as the kid who discovered..... please tell me your perspectives. This is a huge thing and I have time, but I feel like I should start thinking about it. via /r/Parenting http://ift.tt/2CywLfN