Sorry need to vent

I love my MIL to death but she is seriously pissed at my husband and I for not naming our son what she wanted us too. She named our youngest son so i don't understand why she is so angry about it. My husband and i decided to go with the name my mom picked out. We are both happy about it but she keeps bringing up how much she dislikes it. I'm hoping she just comes to term with our choice and stops being a child about it.