Before a man gets married, it's best to observe how the woman's parents interact. Because a person's future view of marriage is often hidden in the family they grew up in. What you see is not just the father-in-law and mother-in-law, but the relationship patterns she has been accustomed to since childhood. The position your father-in-law holds in the family today is very likely a reference for the role you'll face in the future, but this is not fate, just an important signal. The true determinant of marriage quality has never been who takes charge, but whether both parties understand respect and boundaries.