A suffering helper

Yesterday, Friday, I did not work due to the public servers day. I went to my parents house to spend some hours there.
I usually go there on Saturday morning and spend at maximum 3 hours, reading the Bible and eating together. Yesterday, I stayed there for 7 hours: time enough to listen to my dad's problems.
My mother is with Alzheimer's disease. Whenever I read the Bible, she sleeps. Her contact with the reality varies a lot.
Yesterday, mammy asked me: - how was my mother.
I answered: "Not so well...". It was funny.
After some minutes, I called her "mammy" and she attended me.
My brother, sister in law and nephew are there to support them.
My father lost some document but he does not know how to use computers and internet. I googled about how to deal with this situation and appointed some tasks to him. He began to complain about me, my brother, my sister in law: we are not helping in fact. He told me that my brother uses the car but does not fix it when it breaks, that my nephew is a naughty boy, etc. I told him:
Dad, you suffer a lot! Perhaps you suffer more than me. You are retired, you wake up when you want but I did not know about these problems!
He, at least, laughed of my amazement but continued to criticize everybody.
Unfortunately to my sister in law, my father does not show love to his own grand son. He is a 3 years old child who can not discern disapproval signs, but they certainly hurt my sister in law.
My brother is there to help mommy, but he takes the sorrows of his wife.
As Christians, my sister in law and brother understand what is a suffering helper. Jesus suffered to help us. In Jesus, they are living day by day. I see that my sister in law are in an intensive course to look to Jesus and not to men. She looses the joy in Jesus whenever she looks to dad.