[jp1]

My son's 21months old next week he's been seeing his dad since the end of April,it started he would come round to my house to visit and spend time with him and over the weeks he would take him out for the day then started taking him for anight at the weekends now on and off its 1 or 2nites at weekend,since he's been staying at his dads,he's become difficult when he gets home he won't listen to me,runs off when I want to change his nappie and screams,cry's,kicks when I am changing his nappie.before he goes to his dads he says tar for thank you,and helps me tidy up his toys and plays nicely with his toys,when he comes back he won't say tar and cry's if I ask him to,he won't pick his toys up and he chucks them round the house being destructive.I don't no what to do with him anymore,any one got any ideas?