Question: Suing for equitable distribution of a trust.?

I collected on 2 IRA's (one quite sizable) my deceased brother named me as sole beneficiary. The rest of his estate went into a trust. Now my siblings are suing me as they want what I collected on the IRA's put into the trust so as for a more equitable distribution. Is this legal? People have told me some states have equity laws regarding this.


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