I am doing everything I can to keep my son and his father in each others lives?

I am not gonna go into to much detail but my sons dad and his fam are crzy so I had to get a protective order against my sons father and he cant pick my son up. Ok everytime he used to come over before all the violence. . started he would try to do things with me. . most of the time I was dumb enough to fall for his antics there were times when he forced me, but anyways. . his current girl would always call and call and call askin why it was takin him so long and bla bla bla. . ok well he volunteered her to pick my son up. . and there were times when he she would come with him to pick up my son. . but now all of a suddent she refuses to do him this favor? Why do you think that is??? Shouldbt she be happy she doesnt have to worry about her man cheating on her anymore?? Shouldnt that show her I dont want him and that it is all about my son? On xmas eve I was invited to my ex's gma house. . I went even though him and his new girl were (b/c I dont have feelings for him anymore) Well she ended up leaving super early?? I dont get it if I am comfortable being around the female my ex cheated with and left me for. . why are they being so childish abou it?