I feel your pain Cliff.
I am very fortunate that my better half is supporting me to the hilt over me building my business. I am actually the one who is forever moaning that I am not doing well enough!
Seriously though, how long have you been in this game and how well do you personally feel you are doing?
These are personal questions, the answers to which don't matter to anyone else but yourself.
If you feel you need to build your business up some more, why not set yourself some targets, eg x number of customers by the end of the month.
Your wife needs to know that it takes time to build a window cleaning business up (2 years + if building from scratch) and you need to pace yourself while doing so or you will burn yourself out.
If you need to, take a day off to recharge your batteries, or gear yourself up to do an hour or two canvassing. Whatever you feel you need to do, try not to let it stress you out, and look at it as a work in progress. Once you have achieved your targets of xxx customers are £YYY, you will have a decent business which you can look at with pride over the effort you have put in to make it successful.
Best wishes,
John