Advice needed!! issues regarding ex and my son?

Your ex should know better.He should realise that access can have restrictions put on him although I doubt if his mother realises the problems that you are having.I would write to her and explain that you are the mother of the little boy and would appreciate it if she would stop trying to influence your little boy against you.You could talk to your solicitor who would send her a polite letter explaining your problems and if she continues you would oppose your sons visits to her home.That normally works.A lot of grandma's think they know best,they might well do,but it is your child not hers.We all learn by our mistakes.You and her son made one mistake in getting married,but that is in the past.I get the impression he is a mummies little boy and will always do what mummy says.Sorry,he had his chance and blew it and his mother is trying to put the blame on you.Tell her to keep her nose out of your life.It is hard for a father who has access to a child for a week-end.Knowing where to go and what to do every time.Perhaps he would be better off just seeing your son for 1 day rather than a week end.