Between him and his wife, Ardyn was the overly emotional one. When her water broke, his wife calmly told him to get the doctor while Ardyn just couldn't calm down. This didn't just extend to their relationship, he was so emotional that he was thoughtlessly impulsive. A cat stuck in a tree turned into an Ardyn stuck in a tree and she had to save both. The next village over has a sick person but it's night time? Que Ardyn running off to help and almost dying 20 times over but his wife saved him.
consequently, this is the cause of most of their arguments