Kinda. The potential mothers all react differently to being pregnant, but you can't get any of your Maids pregnant.
There's a quest that should trigger the first time you get a potential mother pregnant where you got to Phoebe and she explains that for you.
I didn't expect there to be related tasks, it's so surprising. This will be a great game, will there be any interaction with these mothers during pregnancy? Are there any plans to make maids pregnant in the future? Players can share some of the work of the maids and pay a price for their pregnancy, which can also help them weigh whether to let more maids get pregnant. Perhaps this can improve some playability and immersion
Most of the potential mothers have alternate dialogue after they're pregnant, yeah. Deirlinn in particular gets some special events, and you can invite them to the love shack, though some content is locked until after they give birth.
I've considered making it possible to get the Maids pregnant as part of the post-game after the story is complete, but that's far enough into the future that I haven't made a decision one way or the other yet.