WIBTA if I told my fiancee’s best friend that she is not entitled to a discounted gift every year?

Edit: I see, that majorly we would be the assholes, and that verdict is totally okay and I see the issues, people are bringing up.
Just maybe one addition:
The friend is the kind of person inviting herself to things and her way of doing this is what’s bugging me, and it’s why I had the feeling, this is the kind of "inviting herself" I do not like.

But I hear you! And I see where it’s an issue from my/our side.

Hi everyone,

Unfortunately I didn’t know how to phrase the post’s subject better, but here is the context:
The region where we live in has a yearly coupon book so to speak. There are many food restaurants and other activities in there, where you for example can get 2 for one and so on.
Funny enough my soon to be wife and I got one last year and didn’t use it, but that’s not the point.
The company I work for can give out those coupon books with a 10€ discount. And since my fiancee’s best friend loves this book, I thought, hey, why not buy her one for the discounted price as well.

The normal price is 43 € and my company gives them out for 33 €. Of course she gave us the 33 €.

Now, here is the part, where I want to know if I (and my wife) WBTA:
Said friend asked her multiple times, if my company gives the discounted coupon books out again this year. She asked this even before the promotion started at my company.

Now, being the nice guys we are, I got her the coupon book yesterday, and my soon to be wife will give the book to her the next time she sees her friend.

But my fiancee and I are thinking about telling her friend, that she’s not entitled to this in any way. I think, what’s bugging me is, that she repeatedly asked about it and therefore somehow expects us to give her what she wants (well, we do tbh), but we’re still mad about it, and would like to tell her somehow.

Tl;dr: WWBTA if we tell her friend, that she can’t expect to get what she wants just because we got her this one time?