Historically poor, married women did tend to stay at home, but frequently worked from the home sewing, washing, small scale manufacturing etc… The Industrial Revolution reduced the value of that kind of work though.

Until near the middle of the century running a household of as too time intensive for most women to go off to work.

Nannies and maids were generally unmarried, childless women.

I’m the early 20th century only 5% of married women worked outside the home in the US https://www.brookings.edu/articles/the-history-of-womens-wor...

Also only about 7% of children lived with single mothers in 1900.