Managing overbearing in-laws?

My MIL is ALWAYS over at the house. She holds baby girl and tries to keep her awake while she’s visiting so she will “sleep better at night”. Shes telling me not to wake her for feedings “she’ll always wake when she’s hungry”, telling me I’m wrong when I see feeding cues, telling me we should put baby oil on her face to treat her baby acne,... She’s giving advice and recommendations that fly right in the face of what our dr is telling us. And my husband is not stepping up and telling her NO!

How do I handle this while not being a total bitch???. Because I’m furious and I can’t deal with this every damn day.