My mother in law has been banging on for months about wanting my sons birth certificate so she can open a bank account for him. I eventually told her today that would not be happening and if she wanted to put money aside for him when he is older to put it in his trust fund. I told her I was not happy with her being trustee it isn't just money from her that will be paid in but money from my nan in law to. I am against it as my husband her son had am account that was tied up till he was 18 and she took the money that relatives had put in and squandered the lot. Am I being reasonable to say to her I want her to have nothing to do with money that has been given to my son?