MIL won't call baby by name we chose

We've announced the name we picked for our second daughter to both sets of parents. My MIL won't utter the name we chose. Instead she keeps calling her a variation of her own name. I'm 36 weeks pregnant and while I feel like she's half joking about it, I'm also annoyed and a bit worried that she will continue after the baby is born. I swear to god if she even TRIES to call this girl anything but Amy after I've laboured and pushed her out of my body I'm going to lose my shit. I've politely and gently tried to hint I would prefer her to start using the name we chose but honestly I think she secretly likes annoying me/trying to piss me off. I'm this close to telling my husband to outright tell her to stop it but I think he believes she's fully just joking. 😡😬😤