Then yeah.. It was bound to happen. But if it didn't maybe they would have had the space to get to know each other better before he was sent off to war? Then again maybe her being pregnant with the next heir is what allowed her to have the political upperhand against that uncle?
Either way she had enough issues to strain her mental health. She got married out of obligation. Her father and father and laws health declined. She has been isolated with only her husband to rely on and he gets sent to war. All that plus pregnancy hormones??? I'm wondering how dark this can get with regards to her mental health. She said she wanted to die after all.
Ahhh this is so sad

Like of course she got pregnant.. Two teens having unprotected sex would lead to that without careful planning. And even then if her cycle is off by a week (cuz that shit changes when it wants sometimes)