Part 2:

NOTHING could have prepared then for what they found.
"AAAAAAAAUGHHH!"
"WAAAAAAAUGHHH!"
"YAAAAAAAUGHHH!
"AAAAAAAAAUGHHH!" They all screamed in horror.
"DUDE!" Mikey's hand scrambled across the table, grabbing the closest item at hand, which happened to be a stray sheet of sandpaper and he quickly covered himself, his normally green face glowing a bright red.
"THERE IS A THING CALLED KNOCKING!" Donnie shrieked. He quickly grabbed a hard hat from the table, a feeble attempt to restore modesty as he struggled hard to catch his breath.
"WE… WE DIDN'T KNOW!" Leo yelped. "We…!" He spun around on his heels, eyes wide. Raph acted fast, grabbing Leonardo the wrist and yanking him back through the door from whence they came, slamming the door shut tight. Then he threw all of his weight against the door, as though the pressure would somehow push the image out of his head.
He looked over to Leo. His eyes looked just as traumatized as he felt. The long moment that followed only forced them to soak in what they just saw and then Raph pushed off from the door and opened it again to numbly peek inside.
Leo listened to the two wails of his two brothers behind the door and Raph calmly shut it again.
"Nope, that was real," he confirmed.
There was a long moment of silence before Raph turned on Leo. "Did you know about this?!" he demanded.
"Are you kidding me?! I had NO idea!"
Raph looked back and forth the door, his head spinning. "That image is burned into my brain! How did…?! Why did…?!" His brain sputtered with so many questions he could hardly keep up. And then one thought finally stuck, screeching his whole mind to a halt, one that made Raph inexplicably angry.
"Mikey's off limits!" he yelled. and then he threw the door open, this time storming back inside the garage. Leonardo quickly scrambled in after him just as Donnie and Mikey had finished throwing on the last of their gear.
Mikey swallowed, nervously tracking back to hide himself in the chaos of the garage, face flushed and eyes averted to the floor, wishing somehow he could disappear.
Donnie would have loved to entertain such luxury himself but unfortunately he had other problems, as Raphael was plodding murderously towards him from across the room, his gaze zeroed in and set to kill.
Donnie glared back at him to front his fear until Raphael finally came to a halt inches in front of his face.
"MIKEY IS OFF LIMITS!" he shouted.
"...What?!"
"Raph…" Leo tried to stop him but Raph wrenched his arm away.
"No. You broke the Bro Code! Bro Code clearly states that nobody has sex with Mikey."
"What? Bro Code?!" Donnie blushed indignantly. "I-I'll admit a line has been crossed here but I should think my personal bedroom affairs are MY business!"
"They ain't when ya put Mikey in `em!"
"Raph… let it go…" Leo pushed him back. "Let me handle it."
Leo cleared his throat calmly, his eyes locked authoritatively as he addressed them.
"Donnie… Mikey," he emphasized, "I will not disagree that what you two do behind closed doors is your business…"
Raph growled something angrily under his breath and Leo jabbed him.
"But this is the garage," he continued, "and…. I… still can't believe I'm having this conversation," he muttered.
Donnie stood a bit straighter, his eyes narrowed venomously. "Really? And you have nothing to say about you and Raph's behavior? Or, say... yours and mine?"
The silence that followed next was so intense you could hear a pin drop.
Mikey blinked in confusion, peeking out from behind the table. "…Whaaat?"
Eyes grew wide and Leonardo grew pale.
Raph looked over at Leo. "You slept with Donnie?"
"Umm…"
"Woahhhhh," Mikey marveled. "What a twist~! So… wait… you… slept with Raph?" he asked Donnie, not quite understanding.
"No, I slept with Leo," he explained.
"…Heh. Nice."
Raph gaped. "NICE?!"
"I… can't… even…" Leo blinked. The fact that Mikey approved of that somehow made everything way too hard to process.
Truth be told, it was a lot for all of them to process, and the result turned into a glaring silence.
It was Donnie who broke it. "…Well… this is officially weird."
"Yeah, weird is an understatement," Raph snapped.
Mikey was still figuring the math to all this, as though this was all a complex equation.
"Soooo… wait, Donnie's slept with me and Leo….. Leo's slept with Raph and Donnie... I slept with Donnie... and then Raph slept with Leo?!" he asked, his fingers pointing every which way, trying to get it right.
Each one of them winced at his words, but not one of them denied it to be false.
"W-Well... um…" Donnie started.
Raph planted his face in his hand. "You're an idiot but yes."
"Great, now that all of our business is out there..." Leo gritted sarcastically.
"So the ones who haven't slept together are me and Leo... wait, I've never slept with Raph... or have I? No wait, that was just a dream..."
Raph sputtered. "You had a dream...?!"
"Shh, dude. I'm trying to think... I think we're missing one with Leo. But then again Leo's slept with pretty much everybody..."
"I HAVE NOT!"
"Except for me... Wait! I've got it! It's Donnie!" he pointed, "You haven't slept with Raph yet!"
"I've never planned to sleep with Raph!"
"Hey what's wrong with me?" Raph asked, offended.
"Nothing I..." Donnie blinked. "Are you not listening to this conversation?"
"Yeah, I am. I'm just wonderin' what's wrong with gettin' down with me? Apparently Mikey and Leo were good enough..."
"Hey what's that supposed to mean?" Leo asked, offended.
"Guys guys guys," Mikey intervened. "It's all cool. I've got this... In order to complete the weird cycle of weird: me and Leo have to get together, then Raph and Donnie have to, and then me and Raph would get together last."
"WHY WOULD WE EVEN DO THAT?!" Donnie wailed.
"Uh, to complete the love triangle, dude," he drew a triangle in the air but paused when he thought about it. "…or square..." he paused, "…it's a square."
Raph smacked him hard upside the head.
"Ow!" Mikey glared.
"We are not a… love square!" Leo couldn't believe those words just came out of his mouth. "…That… doesn't even sound right!"
This whole conversation was one giant nightmare!
"We kind of are..." they turned to Donnie, who twiddled his fingers. "…i-if you really think about it," he muttered awkwardly.
"See?" Mikey asked. "So if we complete it, it makes things less weird. Nobody can hold it against anyone else cuz everyone has slept with everyone!" he pointed at his brothers accusingly.
"...I'm pretty sure that'd make things more weird," Raph stated.
"Nuh-uh, you just haven't tried me yet," Mikey smirked.
Raph blinked.
Did Mikey just come on to him?
"Nobody is going to try anybody," Leo says firmly. "None of this should have happened in the first place. We are not a love square. We are not anything. We are brothers... Maybe we've had a few weaknesses under our conditions and maybe we've made some bad choices going about them but..."
Raph's eyes panned over. "Bad choices huh?"
Leo winced. That had been a poor choice of words. "Raph, you know what I mean..."
"...I rocked your world nine times."
"THIS CONVERSATION IS OVER!" Leo shouted loudly.
Donnie crossed his arms indignantly. "I spotted you six."
"Again, this conversation is over!" he sighed in frustration. "Yes, I had sex with both of you, can we drop it?"
Mikey scratched his chin knowingly. "I'm sensing some tension here…"
"MIKEY!" they all yelled.
"I'm just sayin'… I think we all need to unwind… and relax a little," he threaded his arms around Raph and Leo's shoulders. "We're all mutant reptiles here… Lighten up." Leo flicked his fingers off of him.
"Go wax off, Mikey," he said and both Raph and Leo walking out of his touch.
"Aw come on~" Mikey whined, then turned to Raph, "what about you, Raph?"
"You couldn't handle me," he said over his shoulder before walking away.
"I could so!" he pouted, running after him. "Ask Donnie! I'm good!"
Leo numbly stared after him, then looked over to Donnie.
"…He really is good," Donnie admitted, nodding.
Leo unwillingly digested that and shuddered. He was going to have to do hours, possibly days of meditation and training to shake all of this off.
Maybe that's what he needed right now. Meditation… meditation and lots of kata practice. Leo shook his head and made his way to the door.
Or he would have, had Donnie not barred his path.
Leo looked up at him questioningly.
"I—wouldn't go out there if I were you," Donnie warned.
"And why not?"
Donnie looked at him seriously. "Mikey's on the prowl."
"What? Don't be ridiculous," he pushed past him. But Donnie only stood in his way again.
"I'm serious. I know that look in his eyes, Leo. I-It may be too late for me and Raph but…"
Leo interrupted. "Raph has never…"
"He will. Trust me when I say Mikey will have him by the end of the night."
Leo let out a short laugh. "There is no way."
"And the second that he does, he's coming after you…. And he's going to do whatever it takes to get you."
"Donnie, that's crazy."
It was clear that no matter what Donnie said, Leo just wasn't going to take him seriously.
"Fine, don't listen me," Donnie conceded, "but don't blame me when you are sucked into the terrifying vortex that is Mikey."
"I'm sure I won't." And with that Leo pushed passed him, knocking his shell as he did so and he walked through the garage door. Donnie watched silently, knowing full well the terrible fate that would inevitably fall upon his brothers.
…One week.
Even with Mikey's prowess, Leo would put up a fight. It would probably take him a week to take Leonardo down.
…One week, tops.
….Maybe they could make a game of it… A wager…
Donnie shook his head. That was a terrible, awful idea, sick by every means. He shouldn't have even entertained the thought.
….His dark umber eyes turned over the overwhelming mess scattered across the garage floor.
…..Maybe he could use the situation to his advantage. Just a little.