Personally I think it depends on the parents. My dad was abusive and if he were alive NO WAY would I have told him anything about my MI. He would have just said something horrible to me (he always had something horrible to say to me anyway) so I would have never told him. Its not like he would actually care, he made it clear he didn't want no God **** kids all of my life so no way would I have told him. My mom if she was alive I would have told her. She suffered from MI and I really think she would understand.

I guess just prepare yourself incase it don't go how you want it to. Its hard to change the minds of people who are set in their ways. I wish you luck.