n The Flopsy Bunnies, Benjamin Bunny and Peter Rabbit are adults, and Benjamin has married his cousin Flopsy. As for Peter, Mopsy, and Cotton Tail, they haven't been married yet and still live with their mother . The couple are the parents of six young rabbits generally called The Flopsy Bunnies. Benjamin and Flopsy are "very improvident and cheerful" and have some difficulty feeding their brood. At times, they turn to Peter Rabbit, but there are days when Peter cannot spare cabbages.It is then that the Flopsy Bunnies cross the field to Mr. McGregor's rubbish heap of rotten vegetables.One day they find and feast on lettuces that have shot into flower, and, under their "soporific" influence, fall asleep in the rubbish heap, though Benjamin puts a sack over his head. Mr. McGregor discovers them by accident when tipping grass-clippings down and places them in a sack and ties it shut then sets the sack aside while attending to another matter. Benjamin and Flopsy are unable to help their children, but a "resourceful" wood mouse called Thomasina Tittlemouse, gnaws a hole in the sack and the bunnies escape.