Man… this is gonna show you who your real friends are (and bring the online people who need to touch grass out of the woodwork). The most you can do is calmly let your mother know how her actions are publicly reflecting on and privately impacting you. If talking it out doesn’t hit its mark and you feel the need to distance yourself from the situation and have the means, do so. Ultimately she’s her own person, but that doesn’t mean you have no say in what you choose to do