Arthur Babysits/Arthur's Cousin Catastrophe

'Arthur Babysits': Despite warnings from D.W. and Prunella, Arthur babysits the Tibble Twins. As their babysitter, Arthur tries being tough, but the Tibbles keep misbehaving./'Arthur's Cousin Catastrophe': It's time for the annual Read Family Reunion, and Arthur dreads it because his cousin Mo is there, and every year she humiliates him.