Covid19 and family members

My fiance and I have a one year old and we have been finding ways so he can still see his family. I am more cautious and he thinks that if youre working from home but still going out and having certain guest over. It's ok. We finally decided since we live in California and our numbers are the worst and all other factors. That our family (moms, dads, siblings) need to get tested and the typical sanitize hands etc. Everyone was on board except for his mom. She said that if she has it (works from home rn) that it could affect her job and she'd have to be on unemployment or whatever. Now, knowing her. She's doing it because she can't stand the fact that we are asking her this. Sometimes she gets very sensitive and doesn't understand that it isnt personal. And so he tried to tell me that basically with that said that I can have my mom come over without her getting tested . I felt like he was just trying to make it even. And I don't agree with it. You want everyone else to do this. Except for your mom and now my mom (because of his) all because she doesn't want to do it ? I'm so frustrated and at this point. I'm not sure what to do. It feels like this will be an ongoing issue with everything and I won't ever get a say or we agree on something and he will change his mind just because his mom asks him to. I feel disappointed and if she comes I'm not sure how to handle it or what to do with my son. Please help. I need advice.