Flower Girl’s Mom

Etiquette question regarding the pre-ceremony photos, which will be off-site from where our venue is. Note, I am not a parent, so please try not to hammer me for being insensitive about this.

The best man’s 5 year old daughter is a flower girl in our wedding. We will be doing a first look and pics with wedding party/our immediate family before ceremony. This child’s mother is an invited guest, obviously, but not in the wedding, and I find her to be bossy and a very intrusive presence in general.

What’s the etiquette on having the mom along/not having her along for the photos? The dad will be with us and can (I assume) take care of his child for an hour or two of photos.