then you know what you do...live well. yup, the best revenge is to LIVE WELL, very VERY well in fact. Obviously it's over, and the more time you spend trying fight with him and her and make sense out of this selfish and already senseless act he played on you, the more it's gonna get ugly in front of the children.
Just lift your head up and say, F*** it! Go get yourself a facial, buy a new outfit and go out! Apparently they aren't suffering over you, so why should you over them? Plus, if he is weak and pathethic enough to do that to his wife, then I can guarantee you he will do this to your friend...karma heeds no eye when it comes to that ****, trust me honey!
When he sees how well you are doing, he is gonna question himself because even though he seems like he doesn't want you anymore, love just simply doesn't die overnight...he is trapped in lust that's all. Soon this fire between the 2 of thm will die down and he will be left hanging in the air with no family and you will be totally over him, and possibly with a new love of your own. Let him go...he deserves the trifling *****, not a kind, loving mother like you