What would you do in this situation?

There was an e-mail from my brother earlier this week announcing the birth of his first granddaughter and included adorable photos of the mother and child.

The problem I am having is that it is not his granddaughter, at least by birth. It is the the child of his second wife’s daughter.

Our brother has three young adult children by his first marriage, and two of them have a very strained relationship with their dad, despite his attempts over the years to maintain the close relationship he once had with them.

The e-mail and photos were sent to many friends, his children, and his ex-wife. My first reaction was (and to a degree, still is) one of mortification that he could be so insensitive to the fact that his own flesh and blood might take offense to the fact that he claims this child as his first grandchild. While I understand that he wants to share the elation that he and his wife of three years are feeling, it just doesn’t sit right with me.

Despite normally speaking my opinion, I’ve decided that it is not my place to tell him how I feel about this, unless he asks. After all, the deed, and potential damage, is done.

So my question to the Fluther collection is not only what would you do, but how can I overcome this disappointment in my brother’s e-mail when it might only be a knee-jerk reaction on my part?