There is a lot of important information that is not known, but based on what you have shared, I make the following suggestions.
First and foremost, your daughter must communicate with her husband and share her feelings and thoughts (without casting blame or being negative) and ask his feelings and thoughts on what is effecting his normally attentive behavior and how it can be improved, can a compromise be agreed upon that will satisfy both parties, etc.
A session with a respected pastoral or Christian counselor may be appropriate to help build her self-esteem and strength for managing her life, particularly with a child on the way.
Instead of watching TV, it would probably be more helpful to spend time learning about becoming a new parent, needs of infants, etc. She could explore the internet to obtain ideas and so forth. If she does not have a computer, there is free use at any library in her vicinity.
Her situation is not unusual, as we know from the Tiger Woods fiasco. Many men find their wives unattractive during the pregnancies. Some handle their nervousness about becoming a father by “running away” from the sight (pregnant wife). Others burdened with the knowledge of becoming a father and the new responsibilities associated with it sometimes become distant and unresponsive, and so on.
Also, it is not unusual for the pregnant wife's behavior and attitude to alter, sometimes become erratic, due to all the hormonal changes that are occurring. Could this be an issue? This is why communications is absolutely essential.
In most cases, where the relationship between husband and wife was good prior to the pregnancy, when the baby arrives, his behavior will change. Many fathers, and most Christian fathers, experience great joy and step up to the plate of fatherhood. And the bonus, quite often is that the in-laws can become allies.