You didn't know that they had a wife, and you REALLY didn't know that wife could curse you and make you permanently pregnant. (you might've known. it is open)

Scenario 1 is where you wake up for the first time with a suddenly massive belly and that you slept with the Witch's HUSBAND.

Scenario 2 is where you wake up for the first time with a suddenly massive belly and that you slept with the Witch's WIFE.

Here is an optional background image.