One puts their finger on the trigger if they intend to fire their weapon. You think she may have walked in and found her hubby and his best friend in her bed together?
I prefer to believe these pictures were taken in the middle of a fight and she has her finger on the trigger because she is getting ready to kill a bad guy.
What really is tops is when a gun babe really knows how to handle a pistol. :-)
Now be a good girl, and take your booger hook of the bang switch...
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