Opinions

So I’m pregnant with my boyfriends baby and his grandma texts me and tell me if it’s a girl she gets to pick her middle name because it’s a tradition of her family’s, my boyfriend said he never heard that, I’m annoyed with that because I have the PERFECT name picked out if it’s a girl. What are your thoughts, keep my middle name, hers , or give her 2 middle names? If it’s a girl which I’m pretty sure the baby is.