Here is how we see people handle this situation
First, congratulations on the growing family. As you have come to realize, it takes a lot of work and juggling to balance family life and work life (especially for small business owners).
We work with a number of sole proprietors (mostly women) who operate a cleaning service. Many of our home remodeling clients hire a professional cleaner after our remodels are complete to really give the new room / addition a thorough scrubbing. Having worked with many of these cleaning pros - I can tell you how some of them have handled the same situation.
1.) As some commenters have suggested, they find other reliable staff to add to their cleaning team. This not only allows the owner to take a step back when they have changes to their family life but also allows them to actively "manage" the business and scale the business by acquiring new accounts.
2.) If you aren't keen on having employees work for you, I have also seen individuals work odd hours (evenings, really early mornings). This allows the other spouse to be home with the kiddos so that the cleaning service can continue to be solely owned and operated. Many companies that hire cleaning services don't like the cleaning group to be there during business hours anyways so this usually works out fine.
I am sure you will find the right solution for your family!
Best of Luck -
Dayton's Top Home Remodeling Contractors - owner