I'd say I don't have a wife, but there's a woman who'd be mad at me for saying that ;)
Seriously, people use the wife or parents scapegoat all the time. In high school my mother told me if I was at a party and being peer-pressured into something I didn't want to do, to blame her in order to get out.
I am, for one, happy to see that people with families bootstrap businesses. I imagine that it can be tough financially and time-wise. So, naturally, significant others should be in the loop.
Disclaimer: 30. Married for 5 years.