I'll deal with that. There's no point in making sure she knows good and well how disappointed I am.

I think this situation is a simple matter of looking at the greater good for your child.

If you throw a baby shower for your pregnant 16 year but fail to address the severity of this situation, that's no good for anyone. To me you still need to address the situation in a way that emphasizes that life will be different, priorities will change, and she now has to make decisions based on what's ultimately best for her child. Those are the points that need to be driven home in no uncertain terms, not reinforcing what a naughty disappointment she was in route to getting pregnant.