01/02/2011 05:12 am ET Updated May 25, 2011

Brooke Mueller 'BLINDSIDED' By Divorce Papers

Brooke Mueller feels utterly betrayed by Charlie Sheen, according to her lawyer, Sorrell Trope.

Trope tells TMZ ... when Brooke and Charlie signed a property settlement agreement back in May ... they agreed to wait a full year before officially filing for divorce. Trope says Brooke made the agreement because "she didn't want to make trouble for Charlie," who was in the throes of a trial for allegedly assaulting Brooke in Aspen.

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