This whole story may be subject to a minor/major rewrite and possibly some expansion.
 
"Oh please, don't paralyse me and do inappropriate things to me with your 3 feet long forked green tongue!"
>The majestic, and somewhat terrifying, Changeling Queen stared back at you in disbelief
>"My... what? Oh, it's you again."
"Your tongue. The one you use to turn proud stallions like me into defenceless love-slaves."
>"I... I... I don't really do-"
>The Queen's entourage, consisting of half a dozen Changelings, now looked as confused as a pegasus in an institution of higher education
>They probably hadn't expected to encounter somepony of your enormous genius, able to see right through their little game
>Much less be ambushed by one
"Don't play games with me, succubus! I'm here, and I know it all. You might as well get started."
>"With what?"
>She seemed to be somewhat slower than you would have imagined
>Oh well, it would have been to much to ask for both a sharp look and a sharp wit
"The seduction."
>"Why would I... forget about it. How did you even get here?"
>Her strong, spotless chitin looked like living metal the shine of the throne room's torches
>You had waited in the heart of the hive for hours before she arrived
>But it was all worth it now
"Oh, it wasn't easy, but I've been planning. I know the way straight into the throne room of your hive,-"
>You made a point of raising your voice and throwing your head backwards, in an attempt to further underline your point
>If your heart hadn't been stolen by a certain green seductress, you were sure you could have had a career in acting
"-so I'm too dangerous to be able to walk freely out of here!"
>The Changelings, likely awestruck by your performance, stood in silence, as if they waited for somepony else to slay the silence
>Finally, one Changeling (you obviously couldn't identify him, because with the sole exception of your heart's black ruler, all Changelings looked the same) spoke:
>"Get lost."
>You smiled
>It seemed like your profound plot had confused even her brightest advisor
"I only answer to royalty."
>Mares love stallions with standards
>It was once again the Queen's turn to speak:
>"Well, then I royally command you to bugger off. I have important matters of state to discuss."
>She was playing hard to get, a clear sign that she was smitten by your charm
"Oh no. While I may be... easily... tempted, I'm not one to give in to threats. You might as well just paralyse me. Look, I'll bare my neck for you."
>Good thing she was so pretty
"With your poisonous fangs."
>"My fangs aren't poisonous."
>You make a mental note to update your anatomical hypotheses of a Changeling Queen with this shocking new discovery
>Right here and now though, it was definitely a disappointment
"Well, that's unexpected, but I can work with it. You just get going, and I'll pretend to be paralysed."
>"And by that you mean I get started with my 'seduction'?"
"Yes. I'd start with the tongue. I've got a bit of a thing for those."
>"My '3 feet long forked green tongue'?"
"Sure, unless you've got a better tongue somewhere?"
>"My tongue isn't 3 feet long! It's not even green!-"
>You had cracked her (metaphorically speaking) now, and her passion and excitement was seeping through
>"-Where would I even have room for a 3 feet tongue?"
>Now was your chance to astonish her with your thorough field-work
"I've been meaning to ask you just that."
>You begin to open one of your saddlebags
"See, I have some anatomical drawings tha--"
>"Please don't. Just leave."
"But you need to seduce me, break me, and add me to your love-harem! I know too much! I could tell Celestia about the hive's location."
>Alien eyes of the most intense, vibrant green stared at you
>"I'm not going to seduce you."
>You felt the flame of courage lessen in your bold chest
>Maybe you hadn't been straightforward enough?
"Not even a bit?"
>"Never."
>Rejection stung worse than the frostbite you had suffered in the long winter months spent observing the hive and following her every step
>You had given your heart to your dark angel, but she had given it deep, white scars
"So to be perfectly clear-"
>You had to press yourself to make your voice stay calm, even though your emotions were storming on the inside
"-there's no paralysis, no tongue, and no seduction."
>"Completely correct."
"Is there a harem? And if so, does it take volunteers?"
>"No."
>You were giving up
>Not even your most elaborate scheme so far had worked out
>Only one thing remained
>To reveal everything
>Were you truly this desperate?
"Chrysalis... I-"
>"The exit is on the far side of the room. Though I suspect you already know that."
"I-"
>"Just please leave us."
"I love you."