my ds was 2 three weeks ago exes sister had a party for him day after birthday ex refused to come to my party on ds birthday.Since the party whenever i take ds to see ex at his mums which is where he wants access to take place ds cries as soon as i get him out of the car and when we are in house he will try to pull me out saying car please.that evening and next day ds will not let me out of his sight will not let anyone else pick him up not even my parents who we live with. Obviously i cant ask ds what is wrong aibu to be concerned