Molly surprises Peggy by reuniting her with her estranged sister, Rosemary, when they take a road trip to Peggy's hometown of Mudlick. Also, Vince and Mike experience father-son bonding when they work together to fix the water heater.

Mike meets his Aunt Rosemary for the first time and is instantly smitten by her warmth and positive attitude - which is the polar opposite of his mother.