Leo's 16
Don's 16 (three months younger than Leo)
Raph is 15
Mikey's 14

Baby Raphie looks like Raph and is emerald skinned and golden-eyed.

The family were gathered around the kitchen table for their evening meal. Mikey had made chicken enchiladas, which were one of his specialties. "Hey, Leo," Raph said. "Wanna go out tonight? There's a re-run of Fast and Furious Seven playin'."
"Not tonight, Raph. I promised Sensei I'd…." Leo looked at his father, hoping he'd help him out. He did want to go with Raph, but he was afraid of what would happen, given the intense chemistry between them and the longing looks Raph gave him when he thought no one was looking. Raph's glances made Leo feel butterflies in his stomach and have a strong desire to drop down and be dominated by the strong and muscular emerald skinned turtle, but he knew he had to control his urges. Their father would most likely not approve of any relationship between them, because even if they were not biologically related, they were still raised as brothers.

"That can wait until tomorrow, Leonardo," Splinter said. "Go out and have some fun, but remember everyone is a stranger, so don't talk to them."
"Great," Raph said, and smiled. "Don and Mikey, ya wanna come too?" Raph asked, hoping they'd say no, because he wanted Leo all to himself.

"No, thanks, dude," Mikey said. "I've seen that movie a zillion times. I'm going to play video games."
"And I have a date with my latest invention," Don said, and he began to rattle on about it.

Awesome, Raph thought. I have Leo all ta myself and we're gonna have a terrific time. "Movie starts in an hour, Leo," Raph said.

"Great," Leo said. "Is everyone finished? If so, I'll clear the plates and wash the dishes."
"No," Don said. "I'll do them. You go and get ready, Leo. Have some fun. You've earned it. Hey, Raph, you can help me, though."

"Sure," Raph said, getting to his feet and clearing the dishes after Mikey and Splinter said they were done. He carried the plates into the kitchen and dried the dishes while Don washed them.

After the chores were done, Raph got ready and then he and Leo headed to the movie. Arriving at the cinema, they got popcorn and sank down into their seats. "This is gonna be good," Raph said. "Ya okay, Fearless? Yer so quiet."
"Just thinking," Leo said, trying not to show how nervous he was being so close to Raph.
"Stop thinkin' and just have fun, Leo. It's Saturday night, for damn's sake. We deserve a night of fun."
"I guess."

Raph tossed popcorn into his mouth, chewed, swallowed and said, "Leo, I'm glad ya came with me. It ain't fun goin' ta a movie alone. We should do it more often."
"Mmm."

The movie came on, but Leo found it hard to concentrate with Raph so close to him and Raph's enticing musky scent hit him every time he leaned over to whisper something, causing Leo to feel a deep yearning pooling in his gut and an overwhelming urge to leave the cinema and…."Hey," Raph said, interrupting his thoughts and staring at him in concern. "Earth ta Leo. Ya look spaced out. Ya okay?"
"Um, I'm fine, I…."
"Ya don't look fine, Leo."
"I'm okay. Just watch the movie." Leo closed his eyes and thought of anything that wouldn't cause him to drop down: Casey naked, April naked with Casey, Splinter naked in the bath.

Raph leaned over, brushing his hand against Leo's, which was enough to undo him. Before he could drop down, Leo jumped up and ran out of the cinema, his heart hammering. Fuck, he thought. Raph turned me on. My own brother turns me on. How could I think such thoughts? He's my damn brother! It's wrong to feel that way.

Raph followed Leo and found him outside of the cinema. "Leo, what happened?"
You happened, Leo thought. You drive me wild. I want you to fuck you me, undo me, hold me in your strong arms. "Um, I just want you to fuck me," Leo blurted out, and covered his mouth in embarrassment. Shit. I so didn't say that, did I? What is Raph going to say?
Raph stared at Leo in astonishment and then he chuckled. "Really, Fearless? Ya want me ta screw ya? Is that why ya've been so jumpy tonight? I make ya horny?"
"You don't think I'm weird, Raph? You're my brother. It's not normal to feel this way."
"No. I feel the same way, Leo, and who says it's wrong? The humans? In case ya ain't noticed, we ain't human and Don says we're probably not related. So why don't we just go with our instincts and have some fun?" Raph stepped closer and said huskily, "I know somewhere we can be alone. Come."
"What if Dad is…"
"Dad, what? We're just gonna have some fun, Leo. Blow off some steam. That's all. Ain't like anythin' else will happen. Ya want some fun and so do I. One night of fun ta satisfy our desires. Ya wanna or not?"
"I want to so much, but…"
"No buts, Fearless. Ya wanna fuck or not? Because I wanna fuck yer brains out and pound ya so bad. I wanted ta tell ya, but I was afraid ya'd punch me. Now I know differently…Just come already."

Leo followed Raph down a manhole and through the sewers until he stopped outside a door. "This is my secret place," Raph said, opening the door. "No one will bug us. Strip."
"You sure, Raph?" Leo asked anxiously.
"I'm fuckin' sure and ya better not tell anyone 'bout this place. Strip. Oh, fuck it. I'll…" Raph leapt at Leo, pinning him down onto the floor, his hands to his side, and started nipping and licking Leo's neck, leaving large red marks and smirking when Leo let out a deep churr. "Ya like that, Leo?" Raph said. "I'm gonna make ya mine. Mine." Raph eagerly tugged off his and Leo's belts and quickly removed the gear, discarding them to the floor. "Ya look so fuckin' hot layin' there, Fearless," Raph said. "Just beggin' for my attention. So damn hot. I'm gonna enjoy this."

Raph shifted between Leo's legs, spreading them with his knee, and rubbed Leo's slit until Leo dropped down with a huge roar; his cock oozing precome. Raph grabbed Leo's cock, stroked it and his own slit until he also dropped down with a deep rumble. He rubbed their throbbing, twitching cocks together and said huskily, "I'm gonna fuck ya so good. Ya ready, Leo?"
"Stop talking," Leo said, letting out a deep churr. "Just fuck me, Raphie."

Raph chuckled, stuck two fingers inside of Leo's slit, prepping him and then he thrust inside. "Fuck. Yer so tight, Leo. Love ya like this. Fuck. Oh, fuck! Fuck!" he churred as he soon came, spraying his essence deep inside of Leo, filling him. Leo went over the edge a minute later, yelling Raph's name, as he came.

Panting heavily, Raph pulled out and lay down next to Leo. "That was mindblowin', Leo. Wanna go again?"
"We should probably go home soon. Hey, Raph?"
"Yeah?"
"Was that your first time?"
"Yeah, it was. Yers?"
"Yes. You were incredible."
"So were ya."
"Does this mean we're a thing now?"
"A thing?"
"Dating."
Raph snorted. "No. This was a one-time thing, Leo. We both know it wouldn't work out between us. I wanted yer ass and ya wanted me ta take yer ass. That's all. Come on. Why are ya lookin' sad? Ya knew the deal before we fucked. I told ya it was just fuckin' and it ain't gonna happen again. I thought ya felt okay 'bout that?"
"I am. It's…"
"I hurt ya, did I?"
"No, I'll be okay, Raph. I had fun."
"Good, besides it ain't gonna happen again. Ya know I'm with Mona and we love one another. I was just feelin' horny and ya were close by and…"
"I understand, Raph. I get it," Leo said, trying not to show his disappointment. He'd loved being rutted by Raph and dominated and it made him realize that he'd always loved Raph and not just in a brotherly way. He love loved him. Everything about him. His golden eyes that were like pools of honey, his strong, muscular body, his thick tail. I've always loved him, Leo thought. I just tried to ignore the feelings, because I thought they were wrong. He doesn't want me and I'll just have to swallow down those feelings now. I won't let him know that I love him and will pretend all is fine. It's for the best. He and I wouldn't work out. We're too alike.

The brothers dressed and headed back to the lair. When they arrived, they were pleased that no one was there to greet them, because they'd instantly smell the heavy, thick scent of sex and sweat and then Leo and Raph would have explaining to do. "I'm gonna shower," Raph said. "Ya gonna join me, Leo?"
"No. I don't think we should. You're not exactly quiet when you churr and we don't want anyone to know, right?"
"Right. Later, Leo."
Leo flopped down onto his bed and thought, being with Raph was everything I hoped it would be. Passionate, fierce, crazy, hot. No, I can't think about him. It was just a once off. He's with Mona and he doesn't want me. He never will.

Leo waited until he thought Raph was finished showering. Then he went to the bathroom, quickly showered and returned to his room, undressing and hopping into bed. Exhausted, Leo was soon asleep.

A couple of hours later, a figure entered Leo's room. Hah, Dark Leo thought. I'm finally going to get my wish and ravage Leo! He approached Leo's bed, moved the sheets off of Leo and gazed down at him. He's so gorgeous, Dark Leo thought. And he's mine. All mine.

Dark Leo spread Leo's legs, causing him to wake him. "What the hell?" Leo said in shock.
"Shut up," Dark Leo said, slapping Leo's face and pinning him down. "I'm taking what's mine and you will lie still."
"Let me go!" Leo said, trying to move, but Dark Leo held onto him tightly, lined his cock up with Leo's entrance and thrust inside, hard and relentless, probing for Leo's sweet spot. He knew he'd hit it when Leo let out a loud churr. "That's it," Dark Leo encouraged. "You love it, Leo. You want me. Me, me, me."

Leo could only groan in a mixture of pain and pleasure as Dark Leo continued to pound away, thrusting in and out, grunting and churring. Leo soon came with a loud roar and Dark Leo climaxed not long after, shooting his seed deep inside of Leo. Smiling, Dark Leo pulled out and said, "That was awesome. We'll do it again soon, Leo. Later."

Leo could only lie there panting and shell-shocked by the whole experience. That was just a dream, Leo thought? I did not have sex with the dark version of myself, did I? It felt so real. I dreamed it. His tail throbbed, reminding him that it hadn't been a dream and the heavy scent of sex hung in the air. I can't tell anyone, Leo thought, blinking back tears. I'm supposed to be the leader, brave and courageous, tough, able to defend myself and I was raped. Not just raped, but by the dark version of me. Tears ran down Leo's cheeks and he burrowed down into his blankets, hoping that if he awoke the next day, that maybe a miracle would happen and it had just been a bad dream after all.