MTL - On the Day the Scumbag Got Married, I Lay Flat and Became His Sister-in-law - Chapter 299 two princesses

Xue Xi is forced to fall in love at first sight with this dangerous man on their first meeting. With death being the only other option, she makes the first move:

The most fucked-up separation in the world, is that there is a baby in your belly when you break up with someone.

Bo Yu draws on his cigarette, slowly puffing out the smoke, and looks at the little boy lying in bed with deep eyes.

Two years later, he finally comes back.

- Description from Novelupdates

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.