I followed up by watching the final two episodes last night, again, this time, just watching for Pen, Marina, and/or Colin scenes.
I won't do another "in depth, scene by scene" thing, just the most important parts.
The main and most important thing I noticed is that Colin didn't believe Marina was pregnant or was lying to him. At all. It basically took his family KNOWING (through Whistledown's column) to keep him from going through with the elopement. What this said to me was that, no, Pen or Eloise telling him anything would have been completely ineffective. Basically, that Pen guessed correctly, "it took a village" to stop him.
Daphne shows up to save the family's reputation with her new status as Duchess. That all works well, and she's kind to all, Colin, Marina, even the Featheringtons by the finale, inviting them to the dance. She also arranges to "find George Crane" for Marina (another option never considered by the way.)
Anyway, the important scene is of course when Daphne arranges for Colin to see Marina with Daphne as chaperone, to hopefully avoid further scandal.
Colin starts out telling Marina that what LW wrote cannot be true. Marina admits it is true.
Colin takes a step back, shocked. "I do not understand, we were to be wed, you said you loved me."
Marina: "Colin, I hold you in the greatest esteem."
Colin: "Esteem? You are a cruel woman indeed to stand here and talk of friendly affection, as if you have not just committed a great sin against me."
Marina: "Speak not of sin, Mr. Bridgerton. I did not come here to be shamed by you, nor anyone else. I did not know better. You may think me a villain, but I did what I thought I must. No one ever truly helped me, or guided me in a different direction. I had no choice. I needed to wed. And you, you were the only man who offered me even a glimpse of happiness."
Colin: "So I should feel flattered then? Consider myself lucky that you chose me, lied to me, tried to trick me into a fraud of a marriage? I shall take my leave of you for the last time, Miss Thompson." (starts to leave, comes back) "You wish to know the cruelest part of your deception? If you had simply come to me and told me of your situation...I would have married you without a second thought. That is how in love I believed myself to be. But I see now that was all a lie." (he leaves)
Daphne approaches Marina, concerned.
Marina: "I believe I would like to return home now. After all, we don't want another scandal attached to your family name." Marina leaves.
Just one more scene when Daphne, being kind and concerned towards Daphne, tells her she will work to find George, through her connections.
Daphne arrives at the F's and asks to speak to Marina alone.
Marina: "For what it is worth I am sorry, your brother is a sweet boy."
Daphne says no need, she came to apologize to Marina. She says she understands. Marina says "I wish it had not happened this way." Marina smiles when talks about George, then reflective, talks about finding herself pregnant and alone. Daphne says George is at fault and hatched the find George plan.
(actually not much reaction from Marina, perhaps hope, but nothing I could use judge her mood at the idea of having George back.)
Anyway, mostly I just included this, to me, important follow up to Swish to show that, no, I seriously doubt a marriage to Colin, based on such lies, and manipulation, would have ever been a happy one, certainly not for him, his hurt at this much of a betrayal is extreme, imagine actually going through with it, and finding out later how long he was lied to, and that he was merely used. His "love" all a sham? Dealing with the gossip and rumors when a child is born 4 or 5 months after his elopement, just all of it.
The other reason I include it, is that I think it does show that Eloise or Pen just telling Colin this would never have worked. He didn't even believe it with the whole family, indeed the whole town knowing. He didn't believe it until Marina admitted it. The ONLY reason he wasn't married is that his FAMILY believed it, and stopped him from even leaving the house.
Last episode Anthony implied Colin was a virgin, I didn't quite get that until now, saying he should have taken him someplace (a brothel maybe?) So, to me, this shows more of a romantic/lust/love delusion he was having. I find it especially sad for him, and for Marina, that had she chosen honesty? I believe he would have married her, and both might have had a chance at future happiness, even though all of Marina's love and passion was for George.