source description:

"Flash, I'm starting to have doubts on this idea."
"C''mon Bursty, I promise they'll be fine with our decision."
"B-But"
"If Princess Twilight did it, and everypony was fine with it, then they won't judge us either!"
"But I'm not Princess Twilight, I'm the Crystaller of Princess Flurry Heart!"
"She has nothing to do with this, Bursty."
"Wait will I be like this FOREVER?!"
"Eh-heh.. yes?"
"FLASH I CHANGED MY MIND."
"Please Bursty? I want our relationship to work, this choice decides our fate together."
"This is crazy!"
"D-Don't you want to have children Bursty? Beautiful, normal children?"
"..we could always adopt.."
"But don't you want to live the rest of your life as a mare, and experience it unlike anything else before?"
"Alright.. for you, Flash. I'll do it."
"Oh my gosh, thank you soso much Bursty!"
"Flash! Stop kissing me like that!"
"Ha ha.. ah, I love you Bursty."
"Mmm.. love you too Flash."
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yeah i ship flashburst
so whats happening is that flash is trying to persuade sunburst to become a mare forever, so they could have children together
sunburst is pulled in, and flash is beyond happy with his decision
and "Bursty" is flash's nickname for sunburst, if you didnt catch that
ill make their children soon <3

bases © SelenaEdeƒ
flash, sunburst, twilight, flurry heart © hasbro