Details on my last post

Okay this is gonna be long so bare with me please. he broke up with me the summer of 2014 to go back with his ex wife but after a day he wanted me to come back. So i did... Ever since then i cant trust him with her. Yes they have kids together ( we have a baby together) but we have them living with us since jan 1st 2017 and we live 4 hrs away from the ex wife. He had to go to court between them and he got to spend time with the kids ( they lived with her at this time) they are supposed to exchange the kids in public. He told me that he was at the park with his kids had she was on her way to the park to pick them up that he would call me as soon as she did (i was 4 hrs away at home taking care of our 7 month old baby). I waited 45 minutes for him to call. Finally after an hr he called and said he was on his way home. I thought it was kind of weird but didnt really put much thought into it. Well we got the clear to pick him his kids new yrs day. She found out we were in town on thanksgiving and she kept asking him to go over to her house after she showered and after 8 (thd kids were alseep) he told her no but didnt tell her he was with me. I asked him if he knew where she lived and he said yes but only because her adress was on the court papers (now it got me thinking something isnt right) i said yeah okay. The next day i asked him again and he said he knew where her house was becuase he used to do delivery's all around town (now i know he was lying). Skip forward to new yrs eve we were driving into town and i asked him a 3rd time how he knew where she lived and again he said her adress is on the court papers i told him we dont have the papers what are we gonna do? He got quite so i asked him if he had ever been to her house and finally he said he had. Then he goes off telling why he went there but he keeps changing his story (even till this day i still dont know why he went) im so freaking mad he lied to my face 3 times and he continues to lie as to why he went there! He had absolutely no business going to her house kids or no kids..