Dealing with the "In Laws!"

They aren't really inlaws but that's the best way to describe my daughter's grandmother and her husband.

They are what seems to be nice people living the life of an illusion. The grandmother has gone off the deep end and has no relationship with her father or son (daughter's father!).

I'm writing because its a strained relationship and its part of my growing how I deal with people. Things are left to lie and I say how I feel. I never was able to do that. I would succumb to silence, and in the end, do what pleased other people.

How did I get to the point of being able to share my fears and my expectations and then stop and listen to the feedback?