Barry and Caitlin married in Flashpoint because they could have met another way. Throw in a line they met at school. Just saying, if a fanfic writer could do it, the writers certainly could, particularly since they could so easily gloss over how they would have met in the AU without STAR Labs. And since I doubt they'd want Flashpoint to last just one episode, I think they'd probably want a deeper connection so they could get more angst out of Barry realizing she's Killer Frost. She's a villain AND his wife?!?

Again, I'm not saying they will be married in Flashpoint. I'm just saying if they want Barry to be married to anyone, I would expect Caitlin way before I'd expect Felicity. Particularly if they wanted Flashpoint to carry over several episodes.

And I don't think the kiss would be a big enough deal for blackmail. If it were, I think they'd have showed Caitlin feeling REALLY guilty about it and maybe a conversation with Cisco in 20 where she talked about feeling like she'd cheated on Ronnie. To set up a sense of guilt big enough to justify blackmail. And...frankly...would Ronnie be THRILLED his fiancée kissed another man? Probably not. But if they can get over death, quasi-amnesia, body swapping, explosive powers, and long absence, it would be pretty darn insane if it was a KISS that was waaaaay too much for their relationship to handle.

I just think, if RF tried to blackmail her with that, she'd be like, "Okay. Hold on just a sec." *calls Ronnie* "Ronnie, there's something we need to talk about. A few weeks ago, I kissed Barry. Well, I THOUGHT I did, anyway. It was actually someone else. Anyway, I know we've been in a really strange place lately and I feel bad about it. I really am sorry to spring this on you. Can we talk next time you get a chance to make it to Central City? Okay, great... Now, Eobard...you were saying about that whole blackmail thing?" Like...why wouldn't that be her response, all things considered?