AITA for not doing anything after discovering that my wife deleted my daughter's novel?

Throwaway for privacy reasons.

I have been married to my wife Hannah (36) for 2 years, She and my daughter Morgan (16) don't have a daughter-mother relationship, To be completely transparent here...they both fight often and just don't get along. Morgan used to spend most of her time at her mom's but now is staying with us for school.

I remember Hannah telling me about a novel Morgan has been writing on her laptop, She admitted to sneaking and looking at it without Morgan's knowledge but she praised her writing style and story telling so I thought that was a positive thing.

Yesterday, I got back home and found Morgan and her mom yelling at Hannah. I asked what was happening and Morgon told me that Hannah deleted her novel, Hannah said that Morgan created a character in the novel using her description and name and making her the villian, not only that but she wrote bad words about her, Mirgan argued that it was just a character and Hannah had no business snooping on her laptop to begin with. Hannah broke down crying after my ex wife thratened her. I just watched the 3 of them fight and did nothing nor said a single word. I stepped out for a minute to get fresh air and moments later, Hannah unloaded on me about how I should've defended her in the argument instead of acting so cowerdly, Morgan and her mom also said that I should've done something when Hannah decided to snoop then delet Morgan's months worth of work. It just became too much with the 3 of them berating me and yelling in my face. Morgan went home with her mom and she was crying and refused to speak to me and Hannah checked into a hotel also refusing to speak to me.

The texts from both sides kept coming in both telling me I should've done something and should've took their side in the argument. I just had to stay out of this one, I was on my feet the entire week working, both mental and physical health are down the drain and I'm tired of them fighting all the time then blaming me for my actions/or lack of. both are expecting me to get involved and do something to fix this but I haven't done anything yet.

Am I the asshole for not getting involved?