Baby will NOT settle for her dad

Hi, I’m getting so frustrated lately. My little one is 4 months old.. she will NOT settle for anyone but me. She won’t settle for her dad or grandparents. It breaks my heart when she is having a complete melt down with her dad because as soon as I take her within seconds she’s fine. It’s getting dad so upset, what can I do to make her settle with at least him for now?! I appreciate any advice given.