Candace is Jane's daughter's aunt's husband's daughter's sister. What is the relationship between Candace and Jane?
The aunt & husband are sister(in-law) brother(in-law) to Jane; because they are Janes daughters "aunt & husband(uncle); the aunt & husband(uncle)'s daughter's sister, (they have 2 girls, one of which is Candace)...Jane is Aunt Jane to her niece Candace.
Hold on....isn't Candace either a daughter or possibly step-daughter?
Candace is Jane's niece.