Mummy and daddy balloon are sick of baby balloon getting into bed with them every night, as he's getting bigger now and their bed no longer fits all three of them. So they buy a new bed just for baby balloon and explain that he is not going to be allowed to sleep in their bed with them anymore.
That night the put baby balloon into his new bed and he goes to sleep, in the middle of the night though he wakes up and frightened he creeps into his parents bedroom but he can't get into the bed as there's no room. Careful he unties his mother's knot and lets some air out but there's still not enough room. He undoes his father's knot and lets so air out and again there's still not enough room! As a last resort he unties his own knot releases some air and manages to squeeze into the bed.
In the morning they all wake up and daddy balloon realises what has happened and he is furious. He shouts at baby balloon " I'm disgusted with you, you've let your mother down, you've let me down but worst of all you've let yourself down! "