Short story Saturday #6

To encourage myself (and maybe others) to write more, I will post a prompt every saturday to write a short story. From time to time I will share what I have written, and if you have written something based on the prompt do leave a comment, I'm curious as to what you would have written.

This week's prompt:

A family with seven kids, each named after a day of the week.

Some questions to get you started:
Why are they called after the days of the week? What are their parents called?