I am so sorry for your loss and for the situation.  If they are the fiduciaries of the estate then they have the right to make decisions that they believe are best for the estate, even if they may go against the wishes if the beneficiaries.  That is the general rule.  The specifics of what is going on may give you the right to legally object - if say they are in breach of their fiduciary duty - so I would speak with an attorney in your area on specifics.  Good luck.