Dear Rarity,
Hello, Rarity, it's me, Adam. It's come to my attention that you're the one that I'm writing my letter to. You see, when Twilight & Spike first came to Ponyville, Spike thought you should be his future wife. I know it sounds silly, but I do mean it, Rarity, you & Spike make a good couple.
You make good clothes for your friends, including Spike, however, after you and Spike got married, Spike decided to be your No 1 assistant and worked with you. I'm really glad you married a special somedragon, Rarity, because I'm glad to be your adoptive father-in law. Also, I heard about your previous encounters with Trenderhoof & Prince Blueblood. Well, I wanted to say I'm sorry it didn't work out, but sometimes, that's what happens with everypony.
Also, you have the best accent voice, Rarity. Don't tell everypony this, but you kinda remind me of Scarlett O'Heara. I'm very proud of you, Rarity. Thanks for being the best adoptive daughter-in law, Rarity.
I wish you, Sweetie Belle & Spikey-Wikey luck for the future
From your adoptive father-in law,
Adam
P.S. Don't tell Spike I called him Spikey-Wikey.
Rarity smiled at the letter that Adam wrote and felt tears welling up in her eyes. "Oh, Adam! Thank you........" said Rarity, as she wiped her eyes.