Boyfriend’s grandma

So my boyfriends grandma keeps trying to convince my boyfriend to leave me. I am currently pregnant with our first baby, and she started this once she found out. She keeps trying to get him to convince me to get an abortion. I would never do that, this is my first baby and I’m super excited. This has caused fights between us cause he lets it get to him. I really don’t know what to do, I’m scared he will listen to her and leave. We do live together and pay our own rent so it’s not like she pays for anything that has to do with me.