The Lucy Show
Lucy and Her Electric Mattress
S1 E12:
Lucy plans to surprise Vivian with a new mattress and a redone room while she's on vacation, but the electric mattress Lucy bought her malfunctions (it moves around the room when the motor is on) and Lucy is forced to return it. However, Vivian returns home early and has no place to sleep, so she and Lucy have to share the boys' bunkbeds for a night.