My brother died on January 2016. His will states my mother as the executor of will and me, the sister, as trustee. The beneficiaries are his children, 50/50 as per his will. His ex-wife is not named in the will due to the nature of their separation. The insurance and superannuation with one company binding contract again go 50/50 to his children as my brother did not want his ex-wife to have free access to his money but wanted the money to provide for them throughout their life. One child has disabilities. The life insurance company has decided that it's better that Mum gets all the money to use as she pleases. How can we stop this from happening? We are not trying to stop her from providing for the children, we just want to see that it is used appropriately for the benefit of the children rather than boob jobs and holidays...which are options she has previously suggested she wants money for.