What to do with family members trying to sabotage your relationship?

I and my partner have been living in another country since 4 years. Mil and fil have come to visit us for the last 4 months after finding out I am pregnant. From the moment they arrived, they have been creating issues with everything. For example, they lied to my husband saying I slammed the door on their face, which never happened and luckily, hubby didn’t believe them. Since he didn’t believe them, they stopped talking with either of us. My doctor advised me not to eat certain foods because of pregnancy. MIL specifically makes those items and then cries to my husband that “ It’s okay if she doesn’t eat my cooking. I don’t care about her but the baby inside her is my grand child and she is not letting my grand child eat the food I cooked “. I have tried and vomited everything couple of times. Hubby didn’t support her on this too. Now, mil is throwing a baby shower in which she didn’t invite or inform my partner’s own brother and my family just to make my husband feel bad. Hubby is sad that his parents are behaving like this and feels that if we argue in front of them, they will be happy. But he doesn’t want to fight. All this is causing stress on me and I am unable to feel happy when I should be the happiest (given the pregnancy and everything). Knowing this side of his parents has caused him many health problems too (high blood pressure, anxiety diagnosed recently). I don’t know what to do. Please advise.

What to do with family members trying to sabotage your relationship?
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