Gain weight simulation fat look chubby

There's definitely something wrong with the way sims' metabolism is coded and how they look depending on their weight and muscle mass. It's totally She was chubby until a teen when I had her work out twice but now she is too skinny.. all the teens and adults get skinny really quick in my game.

The founder of my legacy got really fat after having three kids, but I think it is because the game has a system in place that makes your sim gain weight if they do not exercise, so I don't know if pregnancy had any influence on that or if it was just because I didn't tell my her to exercise during all the time she.