Instead of contacting son when he has told you time and time again not to why don't you sit down and right letters to him and mail the to yourself, set them aside and when the time has come that he does contact you, you can hand them to him and he will know that, there wasn't a day you didn't think about him.
Now not to be harsh, but they have both repeatedly ask you not to contact them and from time to time you do with some excused that could have been handled a different way (like going through the lawyer).
It comes across as disrespectful because you are not hearing them, well you are but you are ignoring their wishes.
