I am so sorry for your loss and the situation that has resulted.  It is such a difficult time and deaing with money does not make it easier.  You definitely have the option of "disclaiming" your inheritance but I would caution you on doing that until you bring the Will to someone to read to tell you how your portion will be distributed.  You see, Wills are generally written to make sure that any money not accounted for becomes distributed or that any money disclaimed is split between certain parties.  At least a well drafted Will does that.  So even though you wish your portion to go to your siblings, the Will might not allow that.  It may, instead, be best for you to take the inheritance and once it is yours, to give it to your siblings.  Make sure before you say anything.  Good luck.