Overbearing Mother

My parents came over today and the topic of “favoritism” in kids. My husband says we treat our 3 kids the same. To which my mom said favoritism happens naturally. I said to her she did play favorites when I was growing up. Then she said she didn’t know better. It contradicts to what she said before that. This, topic blew up to something bigger between her and I. She doesn’t understand that her overbearing behavior is not welcomed. And she tells me, she’s my mother and is entitled to talk to me without a filter. I just don’t have to take it to heart!! I said, but I do!!!!! And she’s completely dismissive and disrespectful towards me by continuing to talk to me in a way I’m saying her to stop. She tells me, what if I comment that your daughter is ugly, you don’t have to listen to me! I’m like, why even bother saying something like that in the first place. My husband is telling me to just ignore it and smile and nod to remain a civil relationship or just argue with her over the same things again and again and just be at war. I have to be a bigger person. But do I have to be? It really pisses me off that I have to constantly take in all this mental beating.