I agree with the others that you do not need to accept this godmother change.
1. there is nothing wrong with the current godparents 2. if she wants this person to be an influence on your child that is fine (or at least I don't think you need to fight about this now) but there is no need to change godparents
It sounds like this idea is just part of the poor decision making your W is currently doing. I don't know every detail of your situation but it sounds like you have the same troubles as many of us on here. Your spouse is suddenly acting very different, testing boundaries and exploring new sides of themselves. It seems crazy and irrational to us. But many of the WAS described on here are behaving the same way.
We have to let them go on their path. It is very likely that they will find out the grass is not greener. Will they return to us when their new dreams are dashed upon the rocks? Who knows! But we can make it more likely by embracing DB. Get out there and focus on yourself. GAL and make your own changes. Look at the mistakes you made in your R and improve yourself. Appear to be strong, confident and happy.
Giving in to every crazy wish your wife has is not going to make you seem strong. You don't have to be mean, but I think you need to just say no.
As someone else said, perhaps reply in an email. Validate her thinking but then you can say you don't want to make the change at this time. I would guess that this request will pass and is likely just in response to goading by the friend.
Mozza, regarding your upcoming lunch meeting, I know you can do it! Be strong, be confident and seem happy. Think of one or two changes or GAL activities you can highlight in conversation. This helped me a lot in meetings with my WAH. Instead of talking about R I would share some great success story I had or just talk about a fascinating new book I read. It helped make me seem like I was doing great and wasn't obsessed with our R and gave me something to talk about in awkward moments. Just remember that she is in a crazy fog right now and try not to get too down about what she says. Most of us have heard our WAS say one thing one week and the opposite the next. Try to stay cool and confident.
