MIL can i just tell her no?

Makayla • Mommy to a beautiful girl and handsome baby boy ❤️💙
So u text my MIL a few days ago telling her I was ordering prints of my DD who is 7 months old, asking her what size she wanted. In turn she asked for 5 copies and told me who they were for. One of the people included a woman who she is friends with that isn't really my favorite person ever. She insists that basically any of her friends children call her "aunt", and she's just off. Anyways, I don't know if I feel comfortable giving her a copy. Advice? (P.s. my MIL is notorious for throwing fits)