Do I need to do anything different here?
The main difference is that you don't do anything, at least not in your name.
If the claim is addressed to your wife, she is the defendant, and she is the one who must respond to the claim. You can of course help her with this, including submitting things for her with her permission, but everything must be done in her name.
The one bit she'll need to do herself is a telephone mediation appointment at some point down the line. This only takes a few minutes and is nothing to fear - we can advise when we get to that stage what to say.