It sounds (to me) that grandma was the mother in this household, and mother to Willow (just not in the biological sense). I truly believe the reason she was not shedding tears while crying is due to not being capable of it. If you look at the scientific aspect, tears are triggered by a psychological response. Studies have shown (do some research on Max Hamilton) that it is possible for a person to be so depressed and emotionally defeated that they literally lose the psychological ability to trigger tears. In such a state, they go beyond mere crying and straight into flat nothingness (with regard to tear duct activity).
I don't even know why the lack of tears is a discussion at this point, but...the above explanation is what I believe is taking place with the grandma. She has gone through Devastation Alley, rounded Catastrophe Corner and has entered into Hell Street. There's just nothing left...absolutely nothing.
With regard to why she is the one who called a country radio station for an interview...perhaps she is a country music radio listener (she and gramps are both over the road, long haul, truck drivers) and somehow that radio station brings her comfort, so she was more comfortable with them (answering Graush).
The interview with grandma was released via MSM and therefore I'm referring to the interview only - not sleuthing either of them. I think they are innocent of any wrongdoing, personally.
