Sentence:  It's difficult to determine which aunt Patience may be referring to here, but Patience had a <WSD>double aunt</WSD> and uncle: Patience's mother's sister Elizabeth married Patience's father's brother Daniel. 
Meaning of the word marked with <WSD> tags:  A woman who is one's aunt in two ways, e.g. being a sister of one parent and the wife of a sibling of the other.