It's bad to give a partner an ultimatum.
Brad notices that his wife Marissa has been gaining a significant amount of weight recently which is negatively affecting her health.
Brad wants his wife Marissa to be healthy and lose some of the weight.
Brad supportively encourages Marissa to join him on his daily workouts.
Brad threatens to divorce Marissa unless she loses 20 pounds.
Marissa is able to get in shape and lose weight.
Marissa feels ashamed and upset  and gains even more weight.