Go to Wolff and order a set of springs for starters, that may be all it takes. These should work in her gun.
TAURUS SMALL FRAME REVOLVERS
Includes Model(s): 73, 85, 605 (NOT RECOMMENDED FOR 94/941)
Please Note: Due to changes in newer revolvers, Wolff trigger springs may require some modification.
Shooter's Pak - Reduced Power - This pak contains 1 each 9 pound reduced power hammer spring and 1 each 6.5 and 9 pound reduced power trigger return springs allowing adjustment for lighter and smoother trigger and hammer action.
SKU Description Price ($) Add to cart
30151 TAURUS 73,85,605 REVOLVER SHOOTERS PAK 7.99
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http://www.gunsprings.com/index.cfm?page=items&cID=3&mID=65