You need to see if he has a weak chin. So check him out with a clean shaven face. Believe me it makes a huge difference. Think about your children.
Facial development is over 90% about nutrition and a few other factors like the child's overall health while growing up like if they develop sinus issues that force them to begin heavily mouth-breathing instead of nasal breathing. This is why when you observe traditional people like
old Somalis or many of the
Dinka today there is a very high prevalence of features like strong jawlines.
Just feed your kid lots of nutritionally dense, organic foods like pastured ruminant meat, pastured raw dairy, pastured eggs, high-quality fish and minimize antinutrient laden foods like vegetables and grains as much as possible and encourage exercise and being outdoorsy and they should come out fairly "good-looking" regardless of how you or the other parent looks. If all else somehow fails just visit a doctor like
this guy or
this guy and they should be able to sort the kid out and make sure their face develops correctly.
Anyway, y'all really shouldn't be so shallow. Focus on your partner's character and how they treat and feel about you first and foremost. Don't boil Human beings down to things like chins. You can do better than that.