From The Writer’s Almanac last Thursday—Alice Munro’s birthday: “She was trying to write fiction, but her schedule was very tightly managed. She couldn’t find time to do it, though she did try to get her kids to nap a lot.” I imagine there must be an un-Googleable interview or introduction out there somewhere where she talks about this specifically (“She feared the fug of maternity, and clung to what she called her ‘double life’—scribbling when the children took naps…“), but this quote comes close to it:

[I]t was simply a matter of expediency. I had small children, I didn’t have any help. Some of this was before the days of automatic washing machines, if you can actually believe it. There was no way I could get that kind of time. I couldn’t look ahead and say, this is going to take me a year, because I thought every moment something might happen that would take all time away from me. So I wrote in bits and pieces with a limited time expectation.

—”Bringing Life to Life” (an interview with Munro), The Atlantic, 14 December 2001

See also.