Princess Sunset Shimmer was exploring canterlot castle, when she discovered an unmarked room. Nothing but a sign that said "Princess Twilight's Personal Study; do not enter".

"Why would Twilight feel the need to keep this room from me? I'm sure she wouldn't mind it if I went in." Sunset Shimmer said before entering. Inside, she found several things, a couple of filly toys packed away in boxes, quite a few photos, and a lone bed. But what Sunset found was a picture of Twilight with a seeminly Pegasus Stallion with the mare holding a unicorn filly with the pegasus stallion's coat and Twilight's mane color. "Wh-who are these ponies?" Sunset asked.

"Sunset?" Twilight was in the doorway. "...I was really hoping you wouldn't have found this place. Not until I was fully prepared to talk to you about it." She said.

Sunset sensed a great deal of sadness in Twilight's voice as the mare trotted over to the bed. "What is all this?" The orange alicorn asked.

"A memorial. The sign was meant to keep others out of here, but I guess it was only a matter of time before you found this place." Twilight said.

"Is there a reason you created this room? Who is the stallion and who is this fillly?" Sunset asked.

"...You ask who the stallion and filly are. You ask the wrong question." Twilight said. "The better question is, who were they." She added.

"Were? Wait...is this about that stallion and unicorn filly that were amongst the causalities from Discord's chaos when it was still going on?" Sunset asked.

"Yes. Before you Sunset, I had a husband and a child. Their names were Flash Sentry and Velvet Sentry." Twilight said. "We were going to be quite the family. But then, tragedy struck when I least expected it." She said. A tear ran down her face. "...Discord's chaotic creations were more unstable than I gave them credit for. It didn't just cost me my parents, but also my first love and child." Twilight said.

"You still have Shining Armor you know." Sunset said. "And I'm here now too. I can help you after all." She added.

"I know. It took me a long time to finally decide that I needed to move on, to find another. And you stood out the most Sunset. In some ways, you reminded me of Flash, but you were different then he was. I have a feeling that, if I had encountered you first, I doubt I would've ever gotten with him. You are much better with helping me with my emotions then Flash Sentry ever was." Twilight said.

"You sell me a bit short. I know I can be good at reading emotions, but I'm not that good." Sunset said. "You fell in love with Flash Sentry for a reason. Just as much as you fell in love with me." She added.

"You always know just what to say to me to make me feel better. Even now, that's one trait you share with Flash." Twilight said.

"So...these toys...were they for Velvet Sentry?" Sunset asked.

"Yes. I had even bought her the latest toy, which was going to be her present once Discord had been delt with." Twilight said. "...She never got to open the package." She added, turning her attention to a wrapped present; forever to be unopened.

"...You don't have to get rid of them all." Sunset said. "I've been working on a spell that could allow two mares to still have a child. I know I'm close to completing it." She added.

"Wh-what?!" Twilight was surprised to say the least. "When...when were you going to tell me about this?" The purple alicorn asked.

"I was hoping to actually complete the spell first but..." Sunset said. "Seeing this room...seeing what you've lost..." She added. "...If your willing to help me make that final push, then...I'm all for sharing my reserch." The orange alicorn said.

Twilight's eyes were filled with tears. "Nothing would make me happier Sunset." The Purple alicorn soon hugged her wife. "Thank you...thank you ever so much for this..." Twilight said with a smile on her face as happy tears fell down her cheeks.

Sunset smiled. "Hey...I'm your wife. If I didn't do something to ease your pain, I wouldn't be a very good wife now would I? At the very least, I can help you rebuild the family you lost. Even if it won't be the same family, for you Twilight, I would do anything." She explained as she hugged back.

"Your the best Sunset. Now I know for sure I made the right choice in marrying you." Twilight said.

Cozy Glow and Shining Armor had heard everything through the closed door before heading off. "Wow...guess even your sister has had her problems." Cozy Glow said.

"I didn't even know she had a lover before Princess Sunset Shimmer. But I knew that there was always some kind of history she was hiding from me whenever I brought up kids to her." Shining Armor said. "...Now I know why..." He added.

"Well, if it's any consolation, this means we really got to tell your sister about you-know-what." Cozy Glow said. "It'd just make her day on top of Sunset's spell." She added.

"Your going to pile on the good news? Why exactly would you do that?" Shining Armor asked.

"To answer that question, Shining Armor, let me first tell you a story. There once was a normal pegasus filly who had five friends. Years later, the pegasus filly didn't seem to age a day, yet she was forced to watch her first five friends die off. It made that filly become unable to make friends and start to lose herself until one day five years after Sunset had to be banished..." Cozy started. The Pink Alicorn would go on to tell Shining Armor everything.

Cozy Glow's full back story is featured in the "prequel" as it's final chapter.

When Cozy Glow finished her tale, she smiled at Shining Armor.

"...That story...it was about you." Shining Armor realized.

"Yeah. It was a long time ago, but I'm really glad Twilight chose to help me. For the longest time though, she wasn't sure what I could be the princess of, until I started going onto the front lines whenever outside forces tried to invade Equestria." Cozy Glow said.

"Which was when you started becoming known as the Warrior Princess." Shining Armor said.

"Mmmhmm." Cozy Glow said.

"Really going to miss Mi Amore Cadenza, AKA Cadence." Twilight said as she and Sunset were back in their own room where Chrysalis was staying.

"You've told me she was your foalsitter from long ago." Sunset said. "It's a shame she was amongst the causalities of Discord's shenanigans." She added.

"Wait...did you just mention Mi Amore Cadenza?" Chrysalis asked.

"Yes. Why, do you recognize that name, Chrysalis?" Twilight asked.

"Yes. She's my mother." Chrysalis stated.

"CADENCE IS YOUR WHAT?!" Twilight exclaimed; jaw dropped.

Yep. I just went there.