In this example, Tracy is Chris' husband. Most people who read this story will probably assume that Tracy is a woman who is being abused by her husband. When reading a name, we typically assign a gender to it. Gender shouldn't be important in domestic abuse cases. Victims of domestic abuse can be men, as well as women.
Abuse is abuse, no matter what the gender of the victim.
Mistreatment does not mean not taking out the garbage or having a dispute over who does the dishes, but mistreatment would be some form of physical or verbal abuse that goes too far thus hurting persons physically or scarring them emotionally. Inflicting a bruise or cut on someone or lowering someone's self-esteem by verbally attacking him or her are examples of mistreatment. Abuse can be verbal, emotional, and psychological as well as physical. Nowhere in the definition does it say that abuse is more of a female problem than a male problem. It is an issue that needs to be taken seriously, regardless of the victim's gender.