AITA for not wanting to respond to my husband's grandma's phone calls because she is trying to convert me to her religion?

My husband is very close to his grandmother. A little background on my husband: he grew up in the JW religion. His parents always pushed these beliefs on him leading him to grow to rebel and recent them for it in this teenage years. He is now an atheist and does not associate with the religion.

His grandmother calls me often and the conversation will usually steer towards the topic of JW and how I should pray and put my faith in Jehovah, how she wants my husband and I to go to meetings with out children (mind you, we don't have kids. She speaks of our theoretical future kids which I do not want.) This is something else that really gets to me but I feel that this isn't my biggest issue at the moment. We are young and also this is no one's business but our own.

These calls have been happening more frequently ever since my husband has been deployed. I live alone and have no friends; my family lives in another state. This makes me feel like she's trying to take this opportunity to push these beliefs even more now that I'm alone and "vulnerable". I don't want to keep agreeing and 'mhm'ing during every phone call. A part of me wants to ignore her phone calls because I have no idea how to deal with this. I feel bad because like me, she struggles with depression and I'm sure she misses her grandson. I miss him too but these calls are anything but comforting... AITA?

Tldr: husband's grandma calls me and tries to convert me to JW. I respect her beliefs but I wish she would respect mine because I feel very uncomfortable during these calls and don't know how to respond.