Wife’s mother and wife’s best friend talking trash behind her back. Best course of action?

My wife got into a confrontation with her mom, dad and her childhood best friend on New Years. All three, my wife’s mom dad and wife’s friend were all ragging on her and she stood up for herself and it escalated into a very tense and explosive confrontation. The mom threw a glass dish at my wife and the dad got into her face and cornered my wife while screaming (the dad is >6ft and wife is 5’1 for context). The mom didn’t recall any of it due to her being heavily inebriated and spun it on my wife.

My wife has been very mild talking to them since then, only reaching out rarely on things that are absolutely necessary. My wife last night discovered texts of her best friend (the one at new years) and her mom talking very poorly about my wife that likely goes back years. The best friend was always supporting my wife’s side to her face in person, but the texts absolutely contradict that and were very hurtful and critical of everything my wife did on the night of the confrontation and before, yet all my wife did was stand her ground and resist against the mutual bulllying of all three of her “support group”.

My wife is very torn up about the whole situation. We aren’t sure what to do about the whole situation but I obviously will support her in any way I can. We live on our own and are self sustaining, and my side of the family can help us if we need it. Any advice or help would be greatly appreciated. My wife does have a therapist and they will talk about this in the next appointment. We are having trouble finding relatable or similar experiences online. Thanks again.