Men, what would you do if you were in my husbands place?

We called my relatives home for lunch. My sister and husband were there too. After lunch we served some dessert. This dessert was given to us earlier by my husband's parents- a local delicacy from their state, when we met them after many months. They took some effort to pack it and bring it to is.
My mom is a known health freak, who avidly avoids sugar etc. So she refused to have it. As the others ate, they discussed the ingredients of the dessert- whether the flavour is banana or jackfruit ... and my mother says "No there is no fruit here. You think there is fruit here? You're all mistaken. There is only sugar here. This is cancer served on a plate."
I knew immediately that my husband would be hurt. So I told her that's not the way to speak. When we have invited you over for lunch and are serving something with love, and you say its cancer.
To make it more hurtful, this is a gift from my husband's parents.
To this her only reply is, "Come on, you knoe how I am! This is how I have always been. I will always speak up against unhealthy things."
The party dispersed soon after. I told her again she should not have said that. To which she said, she was just being how she always is.
Its made things awkward between husband and me.
I feel bad. Because my husband is hurt. I cannot justify my moms behaviour. And it paints my entire family and upbringing in a bad light.