My MIL needs help

My mil is the biggest conspiracy theorist and it’s actually getting really bad. At first, it was manageable to listen to all the stupid stuff that comes out of her and her boyfriends mouth but ever since COVID has happened and Biden has become president it’s gotten scary bad. She talked about how covid was fake (until she got it), she then talked about how Biden is really dead and is being controlled by aliens (i don’t like Biden but what even????), she’s said that the military is controlling us, that the Mormon president (we’re not mormon but she use to be) is wrong for suggesting the church gets vaccinated and how hes actually against God (confused but alright), and a bunch of other things i can’t think of. I’m honestly worried for her mental state though. We had a falling out so she’s not invited to any baby related parties and my husband doesn’t want her around our child but after the Mormon thing my husband and his brother are so scared for her mental state and absolutely wants our child as far away from her. I’ve heard stories of how people deep in conspiracy theories end up having a psychotic episode and end up hurting either themselves or others….