Lucy Jane Pieratt - Morgan / Bath Co.

I'm so confused.I need to know who Lucy Jane Pieratt is and how does she fit this family. I have her as being born abt 1832 in Bath Co., KY. Only verifiable reference to her is Morgan Co, KY m. 4 May 1849 to David McClain.He is rummered to be a ggg grandfather but the notes I have from my grandmother show list Lucy's father as a Riddle.Anyone out there with a sliver of a clue please help.