I think it is just like you said, a control thing, If he takes you to court take copies of your kids marks and just give it to him, but let him take the first step. I am trying to ignore the flea(ex) as much as I can but his controlling ways won't make him understand he has a new life. Anyway keep us posted and let us know how you are doing.
Im thinking that if the uni emails their grades directly to the students then is there a confidentiality issue? Do your children have to tell you their grades?
Let us know how it pans out.