Mafalda had a baby before my trial expired. After I paid for the game, I opened the game and there is no baby anymore. I checked the details screen, but it wasn't there either. When I say it disappeared, I mean she is no longer carrying the baby and there is no kid running around.

The game automatically saves your progress every 10 minutes. When the trial expires, the timer software shuts the game down abruptly, and the game isn't able to save its progress at that time. It's possible to lose the last few minutes of play, along with anything that was accomplished during that time. In this case, the baby came along after the game was last saved.

that happened to me too i had like twins ad my family was so happy and was so surprised because my couple was so infertile berfore.