Fostering ties of kinship is an important duty enjoined upon us in the Qur’an. Allah says, “O mankind! Be conscious of your Lord, who has created you out of a single soul, and out of it created its mate, and out of the two spread abroad a multitude of men and women.And remain conscious of God, in whose name you demand [your rights] from one another, and of these ties of kinship. Verily, God is ever watchful over you!” (An-Nisaa’: 4: 1)
Allah also warns us against severing ties of kinship. It is reckoned as one of the pet projects of Satan. Therefore, to sever ties of kinship is a cardinal sin in Islam.
The Prophet (peace be upon him) said, “One who severs the ties of kinship cannot enter paradise.”
The Prophet (peace be upon him) further orders us to foster ties of kinship, even if the other party is not interest in doing so. He said: “Fostering the ties of kinship does not mean simply reciprocating kindness with kindness; rather it involves fostering relations even with those who are severing them.”
It is, therefore, imperative that as Muslims, we must do our best to forge ties with members of our family-regardless of whether they are friendly to us or not. One of the Prophet’s companions asked him, “I have kinsmen who continue to mistreat me even though I continue to treat them good. This being the case, am I allowed to cut relations with them? The Prophet (peace be upon him) replied, “Certainly not. Rather you ought to continue being good to them in spite of what they do to you. You will continue to be under the protection of God as long as you do so. As for them, they are exposing themselves to God’s fire because of their actions.”
In conclusion: I urge you to make up with your siblings irrespective of what they have done to you.
Almighty Allah knows best.