Update to ex taking 5 yo daughter for overnight visits, but not our 2 yo son.

I made a thread about this a couple months ago, then deleted it because it got a lot bigger than I expected. Thought I'd update you guys.Whoever said that this had to do with another woman, was correct. See, Ex dated another woman while we were separated for a year in 2014. He broke up with her and we got back together, got pregnant and engaged, then we broke up again this past January. He reconnected with her almost immediately after I broke off the engagement WITHOUT telling her that he fathered a second kid - my son.I figured this all out last week when Ex's gf contacted me on social media. She saw pictures of my son and knew that she had been deceived - my son is a spitting image of his dad. My kids hadn't been back to Ex's apartment since the incident where he tried to make me take my son but not my daughter, so she still didn't realize that he was a liar.Honestly I cried. She's not a bad person or anything but I'm pissed that she means more to him than our own son. I'm pissed that he has been messing with this girl's head for YEARS. I'm mad that I ever loved him. He made me feel like shit for the initial separation for years, saying I was a bad partner and mother for having PPD while I worked, went to nursing school, and struggled to care for my child. I felt like I was the one worth leaving, but I see now that it's not true.tldr: my ex didn't want to have my son overnight because his girlfriend was coming over and she didn't know that he had a second child. She knows now because she saw my social media, saw pics of my son, and realized he was full of shit. via /r/Parenting http://bit.ly/2YwexWO