TBIs are extremely serious and don't give a human enough give ("spoons," if you will) to be able to help someone else struggling just as hard or harder. It's a shame for both of them. Medical issues are definitely a valid, heartbreaking, intense reason for divorce. Plus, Heather doesn't have a public persona nor do we know anything about her. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.