The "people" here is family, which is different. Also, this isn't just any old situation....Faye is someone with severe emotional problems, who took forever to trust someone enough to get into a healthy relationship. Dora's brother is now screwing with that. And this is after Sven and Faye had a sexually active relationship that went south when Sven cheated on her and caused massive issues.
There's a history here, a history that Dora thought buried, and Sven's latest self-centered misstep further screws with Dora's best friend, which Sven should know is nothing but bad for Faye but obviously doesn't.
Dora has every right to be furious. The drama was already there.
There's been no confronting yet. I may or may not have confronted the guilty party in this case, I am merely saying that Dora's emotional reaction is both understandable and reasonable. How she chooses to act is an entirely different matter.
OK. But notice how Dora's impending action seems imminent? From the last panel, it doesn't seem like she's going to just sit around and let this take care of itself. I mean, I hope she does, but that doesn't seem to be what's on her mind right now.
Faye is someone with severe emotional problems
She has also proven time and again just how much she's grown as a character, and that's she's much stronger than she even gives herself credit for. She said she wants to let "Sven stir in his own juices", so I really don't get the impression she needs Dora to come in and create even more of a situation.
Dora has every right to be furious. The drama was already there.
IMO not really. The Drama mostly came and gone, and the most recent situation was handled by Faye because Faye is a big girl who can stick up for herself. Now Dora is being angry largely due to her own very personal reasons. OK, nobody's perfect, people are allowed to get mad. And I totally understand the whole "sharing the feelings of your closest friends" bit as well. But I seriously hope Dora is not going to do something "big", because in my own very worthless opinion, it'd be completely unnecessary.
Thought we don't know for sure until next week, I agree with Jazz. Dora's jealousy over Sven/Faye or Sven/anyone has never been for the woman's best interests. With Faye, that was an added annoyance, but the part that pissed her off was that her friend slept with her brother, and ohmygod it's like highschool all over again.
Also, just to reply to various things above that- Faye's 'relationship' with Sven, though not really a relationship, was healthy in her and her therapist's opinion. She has trusted plenty of people quite wholeheartedly, just not while either being interested or feeling up to seeing them (Dora, Hanners, for the former, and Marten, though that was a while ago, for the latter). Her mental illness is, iirc, medicated and at least in therapy treatment. She does not need Dora to get in the middle of this, especially because the fallout from it might Dora as a friend (not because she'll necessarily ever get with Sven, but because no one, let alone bristly Faye, likes it when someone interferes or causes drama).
Also, not entirely related- I imagine with Dora's very likely confrontation Sven's ABOUT to find out that Faye's relationship is in the bad (unless he's an evil psychic and already knows). His response to that information should confirm or deny his assholeyness. ("Well in that case I'll try again next week and it'll work" vs "oh shit I didn't know that, poor Faye' vs somewhere in between ('oh, crap, I thought I was doing the nicest I could. but I guess this means I have a chance'))