Bolt tried to make idle talk, now that Brisk wasn't around. "Hey, Leaf...do you think I have a chance with Brisk?" He asked carefully.
"Yes...a lot. I almost died out there so that Lightning Dust wouldn't come for you. I decided you'd both want to see me one last time...I'll admit that these fights are getting harder, and I might...not come back from one of them. But I try not to die. You guys would hate it, and I'd never get to see you or Brisk again."
"Oh..." Bolt's eyes widened. "Okay...if that's how this is gonna play out... You have an edge over me. I think it's time I tell you what happened between Celestia and I, do you want to hear it?" Bolt asked
"Set the scene. There he was, Discord. I must have been eight when this happened...but he threw all but three of the royal guard out of commision. I was the third. He took out my allies, leaving me in that state you saw me in against Discord. I went for my move, the Searing Shot. I was set and i was about to hit him, but he moved. I rammed into the head of the guard...he died from his injuries the next day. His death was my fault...and I live with the guilt every day. And i feel like Brisk can help me become stable again...she knows how to control her emotions. By the way, I got a quote for you..."He who makes a beast out of himself gets rid of the pain of being normal." Think about it..."
It all came back to Narrowleaf. His family, his friends, everything. In anger, he slammed into Bolt, screaming "You killed my father! I'll kill you!!"
"The hell you will, you little prick." Bolt said, his eyes beginning to burn. "Lay off before you send me to the point of killing. And if I killed your father, that means Lightning Dust is your sister!" Bolt said, his mane now glowing and releasing embers.
"T-that's impossible... Both my father and my mother are Earth Ponies... H-how..." Narrowleaf was shocked. "My m-mother is... she's one of the Mane-" He began to wheeze. "-Six."
Oh god...it can't have been Fluttershy, because ironically that's actually my m-" Bolt trailed. "Wait a minute..." Bolt was speechless. "Are we really? You and I? Is it possible?!?!" Bolt yelled
"Brisk... I remember who I was... And who my Mother is... I'm going home." He turned to Brisk. "I'm leaving to go to Sweet Apple Acres."
"Alright...I'm going too. You'll need some kind of eye in the sky, she might be in the barn. If only Fluttershy were alive...All she wanted is to see her son act nicely...but she never got to. I'll bet the last thing she thought about was how much of a jerk her kid was." Bolt said, bowing his head.
"Brisk, we're going to look for our mothers... I'm sure I speak for both of us when I say we'd love for you to come too." Bolt said, staring into Brisk's eyes. "And Leaf, I'm so sorry about your dad..."
(Sorry, I ninja'd. XD) Brisk turned and looked down. "Can you two start again? I missed something. Who are your mothers?" she said, clearly in disbelief. (OP: Basically Brisk began to walk away.)