Three in a bed

There were three in the bed,
And Little Fish said,
"Roll over, roll over!"
So they all rolled over
And Tia got out
And she looked at the bed
And she gave a shout
"Please remember,
So tie a knot in your pyjamas
She who pays the bills should get the bed."

And then she looked at the girls, sleeping so peacefully, and she sized up the triangle at the foot of the bed, and she grabbed the spare blankets from the back of the bus and said "Humph!"

Tia