I dunno ... do you really want the work, if someone else is prepared to do it? And I guess you don't want to upstage the lady. Since you know you could if you wanted to, you don't need to.
I think you can kill both those birds with one stone. I guess you just make sure that what you, but not someone who is (possibly) vegetarian, might see as a major part of any meal is there. So anything she might provide, since at least it's wheat-free, is probably OK, at least as a side dish, but you do want to be sure there's enough flesh or fish for everyone who might want it. And that doesn't have to be elaborate.
If there's plenty of people, poach a large fish, such as a salmon and take that -- or even just take smoked salmon. Alternatively, how about a ham -- baked, simmered, whatever?