Leo's 17
Don's sixteen
Mikey's sixteen (He and Mikey are bio brothers and fraternal twins)
Raph's 15

Don looked at his girlfriend, April, who sat next to him on the couch, and said, "What do you want to watch tonight? There's an interesting documentary on the natural habitat of sea horses on later."
"Saw that last time. Why don't we watch a show on parenting? We need to know as much as we can," April said, rubbing her swollen belly.
"Sure. Who do you think the father is?"
"I'm hoping it's you. If it is, the baby will have your eyes and olive skin and be so cute."
"And if…."

"Movie time," Raph announced, entering the lounge, with a bowl of popcorn and plonking himself down between the lovers. He pressed a kiss to April's cheek and said, "What we are we gonna watch?"
"Me and April were going to watch a movie, Raph," Don said irritably. "Have you nowhere else to be?"
"She's my girlfriend too, Don, and I wanna spend time with her. Why should ya get her all ta yerself?"

"Actually, Raph," April said. "We need to talk about this."
"Talk 'bout what? Ya love me and I love ya. We're all happy together."

"I'M NOT!" Don roared. "I'm sick of seeing you everywhere I go, Raphael. In the shower, bed. Everywhere. You drive me nuts and I've had it. Tell him, April. Tell him how fed up of him you are. His snoring, his leaving the toilet seat up, his messiness, his domineering ways."
"Is this true?" Raph asked, staring at April and blinking back tears. "Ya don't love me no more?"

April stared at her emerald skinned and green eyed lover and couldn't do it. She couldn't cause him any pain no matter how much he annoyed her at times. "No," April said. "Don's overreacting. I get mad sometimes because of the toilet seat, but if you leave it down, things will be fine."
"And ya, Don? Ya really hate me?" Raph asked.

"I'm going to the lab to work," Don said coldly. "Need some time alone."
Raph watched his brother leaving the room and said sadly, "He hates me, doesn't he, April?"

"No, sweetie," April said, patting Raph's shoulder. "He doesn't mean to blow his top, Raph, but sometimes he wants me all to himself and I feel the same way. I love you, but…We'll work it out."
"This whole sharing thing ain't workin' out, is it?" Raph asked, his lower lip trembling.
"Listen to me, Raph. Don…"
"Look, I can always call up Mona and go back ta her. I mean, I know she loved me. I can…"
"I was just mad with you and told Don, Raph. I was venting. That's all. I don't want what we have to end and I don't want you to go back to Mona. You belong with me," April said, tilting her boyfriend's chin up. "And I'm not losing you to anyone, least of all an ugly alien. We'll sort everything out."
"Mona's beautiful. Not ugly, but she ain't as beautiful as ya and she don't have my heart. I love ya, April, and I'm always gonna love ya, especially now that yer carryin' my kid," Raph said, stroking April's belly and laying his head down on it. "I can feel it kickin'. Gotta be a boy with how fierce the kickin' is. My boy. I can't wait ta meet ya, little one."
"It might be Don's."
"No, it's mine. My gut says it's mine."

Leo entered the room, followed by Mikey, and said, "Tempestra was spotted outside the Smithsonian ten minutes ago. Just saw it on the news. We need to get moving."
"That girl from the video game, Leo?" Raph asked. "Thought we got rid of her."
"I thought so, too, but she's back. Where's Don?"
"Lab."
"Mikey, go get him. April, you'll remain here. I don't want you anywhere outside. Could be dangerous."

"All right, Leo," April said. "But be safe and bring my boys back home to me."
"I'm ready," Don said, entering the room. "Love you, April. Make sure you hydrate and rest and don't overexert yourself. Don't want anything happening to you or my baby."

"My baby," Raph said.
"You can argue about this later," Leo said. "Have to go."

"Hope it takes after Don," Mikey said. "Otherwise it's going to have Raph's temper. Can you imagine a mini Raph, dudes? That'd be scary!"
"Heh. You know what'd be worse?" Raph retorted. "A mini Mikey. We already got one stupido, we don't need another!"
"Hey, I resemble that remark!" Mikey snapped.

"Quit your bickering," Leo snapped. "Get in the van."
"Whatever ya say, Fearless leader," Raph said sarcastically. "Us minions will do yer biddin'."
"Go!" Leo said, rolling his eyes.

Raph kissed April gently on her mouth and Don did the same. Then the brothers left in the van and drove to the Smithsonian, Don behind the wheel.

Sometime later, they arrived at the Smithsonian and, looking out of the window, Raph said, "I see that flame haired vixen over there. Hey, lady, why don't ya mess with someone yer own size?" Raph said, springing out of the van, followed by his brothers. "Leave that little old lady alone!"
Tempestra had been about to hit a woman with her own walking stick, when she saw the turtles. "You irritating reptiles," she said, tossing the old lady in the air and grinning when she fell onto the sidewalk and didn't move.

"You just killed an innocent lady," Leo said angrily. "That's it. Tempestra. I'm going to cut you down to size," Leo added, advancing menacingly with his katanas. "Come on, guys. Turtle Power!"

"Turtle Power!" Don, Raph and Mikey said in unison, as they flanked Leo.
"I don't think so," Tempestra said, using her kinetic powers to lift Leo up and deposit him in a passing garbage truck. Before anyone could react, she fixed her attention on Don and said, "Your turn, you sarcastic creep. I'm sick of your wisecracks."

"Uh, no," Don said. "That's not me. I'm the brains of the gang. You mean him over there," Don added, pointing at Raph.
"You can't fool me," Tempestra said furiously. "I know it's you." She wagged her finger and said, "Make him Gamera now."

With that, Don immediately changed into a Gamera, a giant monster that had the general configuration of a turtle, one that was able to walk on two legs and have the added ability of flying. Raph and Don gasped in horror at the huge monster before them that had a pronounced sagittal crest on the top of his head and teeth and a large pair of tusks protruding upward from the lower jaws. "Holy guacamole!" Mikey said, ducking for cover behind a large garbage bin.
"Run!" Raph said, as Don, no longer knowing who he was or who they were, roared and proceeded to chase his brothers.

"Not so fast," Tempestra said, using her kinetic powers to lift Raph into the air.
"Put me down, ya temperamental witch!" Raph yelled.
"I have plans for you, Donatello."
"I'm Raphael, ya twisted bitch. What's the matter with ya? Bad hair day or something?"
"ARGH! You are Raphael. Only he would say that! Donatello was him," Tempestra said, pointing at the leaving Gamera, who having no one to chase,had decided to move on, scaring countless people as he passed them.
"Put me down!"
"Baby, be," Tempestra said, smiling evilly and waggling another finger at Raph.

Immediately Raph began to shrink until he was a little,screaming baby, who flailed his limbs helplessly. Raph's gear was now too big for him and fell to the floor. "Drop," Tempestra said and Raph fell to the ground, landing on his carapace and letting out a loud wail. "Toodles, reptiles," Tempestra said. "Time for me to continue destroying the city." With that, Tempestra left.

Mikey rushed over to Raph and lifted him up. "Raph, are you okay?" Mikey asked, pressing the baby to his chest and rubbing his shell to soothe him. "Raphie? Oh, silly me. You can't talk. I have to find Leo. He'll know what to do."

Huffing and puffing, Leo arrived and said, "Thank goodness the truck stopped. Ran as fast as I could to get here. Where are the guys, Mikey? And who's that baby?"
"Phew. You pong bad, bro! You need a bath."
"I know. Where are the guys? Wait a minute. That baby looks like Raph. Has his eyes and skin color. Raph, what happened?"
"He can't talk, bro. Tempestra changed Don into a giant Gamera. He started chasing us and we ran for cover, but Tempestra got Raph, changed him into a baby and then she split."
"And where's Don now?"
"Ran that way. Follow the screaming people."
"We have to find him, Mikey, and get cures for him and Raph."

"Bah!" Raph said, reaching out for Leo with his chubby fingers.
"Aww, cute," Mikey said. "He likes you, Leo."

Leo took Raph in his arms and smiled. "I'll get you back to normal, Raph," Leo said, tickling Raph's chin and making him coo.

"Bah!" Raph said, feeling the urge to wee and gurgling as the wee trickled between his legs and landed on Leo's leg.
"Gross!" Leo said, feeling something wet on his leg and holding Raph at arm's length. "That's why he wanted to come to me! Yuck, Raph." Raph just gurgled and looked at Leo with his large green eyes.
"Mikey, get his gear and we'll go home and look for a cure, but Raph first needs a bath."

"No way, dude. I'm not doing that," Mikey said, grinning. "Raphie's all yours. You'll make an awesome mother, Leo!"
Leo growled at the comment and took off his bandanna to wipe Raph clean. Then he carried him into the van and sat down. After placing Raph's gear in the van, Mikey took the steering wheel and they headed home.

I hope we find a cure, Leo thought, looking at Raph, who'd fallen asleep in his arms. We need him back to normal. The team's not the same without him. And we need Don. We need to find a cure fast, before Don and Tempestra destroy the city.

A/N Tempestra was from a video game that Leo was playing in the 1980's TMNT and she came to life.