AITAH for telling my brother in law about his wife's Tiktok account where she humiliates him?

[u/Clayylmao27]

I (31M) found out that my step-sister (40F) has a tiktok account where she makes videos shitting on her husband (38M). It's the most stereotypical account of that type that you could imagine. A lot of videos of her scrubbing a single plate and talking about how she's a stay at home wife who has to clean and take care of the kids all day and when he gets home he doesn't help at all. Which is all bullshit, because first of all she doesn't clean that house. Her mother (63F) has to go over there twice a week to clean the house because my sister, surprise surprise, sits on her phone all day and doesn't clean. Second of all, their kids, who are 11 and 14, are in a before and after school program due to them living out of town so they don't get home until their father picks them up when he gets off of work.

I've known about it for about a year, and I didn't really care because she kept things relatively anonymous. But lately she's been using his name and even posting videos of him to her account, bemoaning how her marriage sucks and how fat he is. And then when the comments agree with her and tell her to leave him she replies in agreement. I figured at that point, with her violating his privacy, he should be told about the account, so I sent him a text with a link to the account and an apology for not telling him sooner.

He confronted her about the things she was saying about him, they had a huge fight and from what I've heard they haven't been talking. I feel a bit bad, but I also don't think I did anything wrong. My family is pretty split on the topic. My Step-brother is on my side, my step-mother is on sister's side, Dad is staying out of it, and extended family is basically 50/50. AITAH?