I guess it is all happening because we two are translating each other and getting different result.

See if I translate your version in English

Nowhere in the story does it say that the father was angry with his mother or his son.

I no where said that father was angry but I said the story took a turn when the sister and brother got angry reading the will in Jeremy's name.

Likewise I read you writing

Regarding the topic, why should there be an agreement when two of the brothers are obsessively greedy, capable of killing their half-brother if he refused to renounce his inheritance?

There were one sister and one brother so the question of two brother does nor arise. But this is my best guess that by these "two brother " you're referring to two siblings.

Have a nice time.