Shannon gets a lot of shit (deserved) but I give her credit for dropping the screenshot: Proving Chantal a liar and Nader as perpetrator of two stabbings, in one fell swoop.
She invited Chantal to her bachelorette party, despite knowing how excruciatingly socially awkward Chantal would be. That speaks to at least a modicum of respect for the friendship that once was. She attempted to engage the frumpy and fat Chinny that night, once or twice in discussion about her YouTube channel and later, in dancing - but of course Chantal would have none of that normal, late 20s/early 30s clubbing scene. (She probably couldn’t fit on a chair nor stand that long but I digress).
She began the limo ride tittering to herself and bragging to the fellow bridesmaids about her channel. She was filming, of course, but unnecessarily loud, interrupting, and rude. Once the conversation just seemed to exclude her entirely she’d loudly make jokes - to no reply. Then she’d repeat it (again, and again, and again) in a desperate , painful to watch display of attention—seeking behavior. Of course, everyone could hear her - they were just ignoring her. It was agonizing to watch, but she remained nonplussed.
Shannon (who had remained in touch with Chantals mother) was told about her spiraling old friend and appeared almost instantly as a mod in her chat, which seemed suspiciously clout-chasing at the time but, with the benefit of hindsight, it seems entirely likely that it was solely to help soothe Kim’s nerves and corral the cow back to her familiar, well-trodden pastures.
She’s abrasive and crass but she also seems genuinely fucking pissed, the kind of exasperated anger born of watching someone be (willingly) abused, or put more gently, watching a loved one be unwilling to walk away.
If when an abused partner ends up dead, some survivors can find themselves positively desperate to make sure it doesn’t happen again, and will pull no punches in doing what they can to make that happen. Whether it’s for Kim or Chantal or someone long gone, I don’t know, but I do suspect that Shannon is trying to stop the cycle, here.