You're Only Young Twice S04 E01 Breakfast at Peabody's

Flora is desperate to get the fur coat offered in Peabody's sale, so she and Cissie hide in the store overnight, keeping one step ahead of the cleaners and the ancient security guards. Eventually, they fall asleep in the bedding department, but for Flora, the next day, there's a rude awakening, in more than one respect.