Widow Threadbarren is a ghost in Raven's Cove. She was once the local tailor, but she perished along with all the other citizens. She holds a grudge against Jolly Roger for forcing her to sew new sails for his damaged ships, then breaking his promise to let her live. She must have had a husband at one time to be widowed, but she never does mention him.
The pirate will have to perform several tasks for her as part of the Raven's Cove quest, including sinking various ships for their sails.