Most adults are just as "juvenile" as children. Most people remain the same person they were when they were 5 years old. I'm sick of 50 year olds acting like idiots.
Just because you're 35 doesn't make you a better mother than me. I love my child more than anything and I birthed him and fed him the same way you did, so grow up.
If my father died, I would be sad, but I would also be relieved that I don't have to put up with him anymore. I would get over it.