Sometimes I wonder how broken from inside these OMs (in my csitch he is divorced) are as well that they don't realize what they are doing to someone's family and taking mothers away from their kids.
It could be argued that your ex has told this guy a million lies about how unhappy she was / how you were actually over before they met etc ( maybe cohabiting for your D sake etc ) - I suspect a lot of lies were told to make him think he has a catch - an honest and loyal but unhappy lady - or he may not actually care.... More likey that the Sex / new relationship buzz are sending him to happy mode.. He probably hasnt given a 2nd thought to the damage and he probably doesn't care less about your D.. Yes i'm sure he is all happy / nicey nice around her, but in reality, he just wants to get your WW to bed..
This OM is probably oblivious to how your WW is ignoring / pushing your D onto you for their romantic weekends away.. Again, he probably wont care, because he doesnt care about your daughter... Or maybe he should see it, but again his head is in love land and he is igorning the signs.
Off topic, but relevant - I am a very rational and logical kinda guy. When i met my WW i saw some text messages to a engaged / married guy that she should never had sent and go against everything she portraid to be as a person. This was 3 months in to our relationship. They bothered me but i looked past them and forgot about them a day ot two later.. I never even raised it with her, even though she had lied.. But why ruin a good thing - good sex, good nights out, good times, butterflys... The characteristics that my WW had ( lies, secrecy, prepared to cheat with a taken guy etc ) were always there.. I just ignored them as my head was in love land.
You cant control it, you cant change it - so just enjoy quality time with your little girl - Make good memories..
And learn from the WW mistakes and become a better father from it...A good example is when you do move on, never do what she has done once your head gets filled with love and butterflys - D should always be number 1. !!! - When you start to date again - If your new partner has kids, - See how she is with them - if she pars them off to their Dad to be with you - RED FLAG - no thanks... find sombody else.. Use what you know to get it right next time
Previous username - Helpme123.. A name chosen at a desperate time..
Now Mr Brightside.. coming out of my cage, and doing just fine.