Most pictures will not reflect true physical appearance and sometimes people look more overweight in pictures. During my free time I keep eating non-stop. Just overeating in free time, and depending on what you are eating, doesn't mean there is an eating disorder. Sometimes TV is loaded with advertising tools to have you focus on food. If you are eating constantly in your free time and that is the only time you have to eat, then I probably wouldn't worry.
Most people drink beverages and eat when they are relaxing.
I'm a husband of a person who is struggling with bulimia. If it is true bulimia and is occurring on a daily basis, then I would assist your spouse in seeking help for it. Do it in a supportive way by saying you are worried about long-term effects of the behavior. There are therapies and medications that can help. The medication will not be needed indefinitely.