family do u have 2 love them

ever since i was little i was always told that blood is thinker then water. this past week i was told that a family issue has been brought up resonlly. it has been around now for a few years but because its a sore subject we just never brought it up during family events. Well its now out in the open and the one thing that i was most passionate about getting because it was rightfully mine i cant get because my aunt wont allow it. i told my family that i would buy it from my aunts and uncles but my family just says to leave it be. should i just leave it be or should i claim whats rightfully mine? i hate this situation