As scandalous as this might sound, it was not uncommon for women to leave their children at home while they worked, even the very young. In some cases, apparently, a parent might rent out her child.
The Times-Picayune (New Orleans, Louisiana), March 20, 1893 –

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As an older woman with an adult daughter who is adamant about not having kids, I’d totally be open to babysitting for fun, but for free. I’m not paying, lol!