Grandma intruding?

A

So we live out of state from my husband's parents. Due to covid they have not seen our kids in a year and a half. His parents are finally able to visit for spring break. My mom (sees the kids every other weekend) has spring break the same time, she's a teacher. She wants to visit often on spring break. I told her no because I don't think it's fair to my husband's parents. She is super upset with me. Am I wrong for telling her no?