Lucy Ann Pendleton first married her cousin ships Captain David Pendleton (1793 - 1822) on October 13, 1816 at Westerley Rhode Island, and had 4 children with him.
Lucy married Stephen Richmond July 2, 1826 at the Seventh Day Baptist church Rockville Washington Rhode Island. she had 11 children with Stephen. The marriage is hard to find because it is under a marriage between Thomas Richmond and Lucy Ann Pendleton
Lucy birth source is;
the book by Everett Hall Pendleton will give you more info; look at David Pendleton #498