My brother who is in charge of my deceased father's estate has not finalized the estate even after five years.

Answer

Since you are aware of the usurpation perpetrated by your brother, the effect of which permeates all the money, etc. in his possession, you too are included in the usurpation although of a lesser degree than your brother. It is not permissible to accept gifts from him nor to eat the food he offers.

CLASSES - ALLAH'S CREATION

The concept of class equality or a classless society is a stupid myth. Allah Ta'ala says in the Qur'aan Majeed:

"We distribute their livelihood among them in this worldly life, and We elevate the ranks of some over others so that some will take others as workers." (Az-Zukhruf, Aayat 32)

E v e n t h e A m b i y a (Alayhimus salaam) are not equal in status as the Qur'aan Majeed confirms. However, higher worldly status is not a factor for the attainment of lofty status in the Aakhirat and for Proximity to Allah Ta'ala.The criterion for Closeness to Allah Ta'ala is Taqwa. Allah's proximity is proportionate to the degree of Taqwa. The Qur'aan Majeed states:

"Verily, the noblest among you by Allah are those whose Taqwa is the most."

Closeness to Allah Ta'ala is not related to worldly status. Taqwa is the treasure and consequence of total obedience to Allah Ta'ala - obedience to the Shariah and the Sunnah of Rasulullah (Sallallahu alayhi wasallam).