Leo is 24 and he and Don are mates. Leo and Raph sr used to be mates and had Tyler together.
Raph was 15 when he died and never lived to see Tyler's hatching
Don is 23
Mikey is 22

Tyler's eight, emerald skinned and golden-eyed like his dad, Raph.
Lisa's six
Alex is four

Alex and Lisa are olive skinned like Don.

The twins :Leonardo and Raphael, who are four hours apart, are forest green and emerald green respectively.

Don and Leo stretched lazily, as they woke up. "Morning, handsome," Don said, kissing his mate on the lips. "How did you sleep?"
"Like a log. You?"
"Same. I wish we could stay in bed today, but we have to get going soon if we want to…

"Daddy!" eight year old emerald skinned and golden-eyed Tyler shrieked, entering the room, followed by his siblings, six-year-old Lisa and four-year-old Alex. "It's time to get up," Lisa yelled, climbing onto Leo's chest. "Daddy, is there a baby in there?" Lisa added, looking at Leo's slightly swollen belly.

"No," Leo said. "Definitely not. I've just been eating more than I should, because it's winter. Right, go to the kitchen. Your dad and I will be there now."
"Can you make pancakes, Daddy?" Tyler asked.

"Yes," Don said. "I will. Get your siblings seated." When the kids had gone, Don turned to his mate and said, "It'd be nice to have another baby, Leo."
"I think three is enough and after me almost dying laying the last egg, I don't think my body can go through it again, Don."
"You're probably right. It was just a thought. Hypothetically, if we had another kid, what would you name him or her?"
"I like Jasmine if a girl and if a boy, Raphael. I know that would be awkward for you, but I would like to honor Raph. He was…"
"You had a life before we hooked up, Leo," Don said gently. "Raph was your first love and mate and I loved him a lot. He was a fantastic older brother and I also miss him. Tyler's so like him in looks and personality. I think Raph would be proud of his son. I bet he's watching down from Heaven with a huge smile on his face."
"I think so too," Leo said, managing a small smile.

"Daddy!" Tyler shouted from the kitchen. "We're hungry!"
Leo and Don chuckled and Don said, "Yes, Ty definitely has Raph's impatience and temper. Come on, Leo."

The turtles went into the kitchen and Don started to prepare breakfast. Not long after, Mikey sauntered into the kitchen, his girlfriend, Holly, in tow. "What are you making, Don?" Mikey asked.
"Pancakes. They're almost ready. Have a seat."

The family sat down together and enjoyed breakfast. Then Leo and Don went to finish the rest of their packing. Afterwards, everyone piled into the van and headed to Mexico. "Daddy," Tyler asked softly, from his seat next to Leo. "Yes?" Leo said.
"Do you think Daddy can see me?"
"Yes. He's watching over you all the time, Ty. Every second. Raph was never one to miss anything and I'm sure he isn't now."
"Do you think you can tell me more about him?"
"Anytime you want. I have something for you. I'll give it to you when we're alone."
"I wish I'd known him," Tyler said sadly.
"Me too, Ty. He was one hell of a guy. You are so like him."
"I am?"
Leo nodded. "He'd be so proud of you, like I am.
Tyler beamed. "Daddy and you are my heroes, especially Daddy. Tell me the story how he died?"
"How about later, okay? It's a long drive and you should get some sleep. You were up late last night."
"Okay, Daddy," Tyler said, clutching the red blanket draped over him. It had been Raph's and he never went anywhere without it.

Nearly ten hours later, they arrived in Mexico at the cabin where April and Casey were waiting for them. "Welcome, guys," Casey said. "April's inside in the kitchen. Have a good trip?"
"Long, but okay," Leo said, stretching his legs and stifling a yawn. "Kids, go inside and wash up. I'm sure dinner will be ready soon."
"We're barbecuing hamburgers."

"Yahoo," Tyler said. "I love barbecues. Daddy, do you need help?" he asked, looking at his parents.
"No, buddy," Don said. "Take your brother and sister inside and go wash up. We can handle things."
"Okay. Come, guys. Let's go check out the place. I'm having the top bunk. Daddy said there were bunk beds."

The kids ran off inside and Casey chuckled. "You guys sure have your hands full, Don and Leo."
"Yes," Don said. "But we wouldn't have it any other way. I just wish Dad was here to enjoy the trip with us. He always wanted to see Mexico. I can't believe it's been three years today since he died. Time flies."

"It does," Leo said, picking up a suitcase and suddenly feeling a stab of pain in his belly. Shit. What was that, he thought? Maybe something I ate. Must be that curry Mikey made last night. Damn. I should go walk it off. "Hey, Don, mind if I go for a walk? I'll only be gone for twenty minutes. I feel a bit stiff after the car journey."
"Want me to come?"
"No, I'll be okay."
"Go, I'll bring everything inside. You sure you're all right?"
"Nothing a brisk walk can't fix."

Alex came running out of the house and saw Leo walking away. "Daddy, I come too?" he asked, catching up to Leo.

"Okay, squirt."

Don and Casey brought the luggage in and Leo and Alex went off on their walk.

Fifteen minutes in, Leo started cramping again. Rubbing his belly, he groaned in agony and sank to his knees as the pain intensified. "Daddy?" Alex asked.
"Get help, Alex," Leo said, grimacing, sweat trickling down his face. "Now. Hurry."
The little boy stared at Leo for a second and then ran off.

It isn't food poisoning I have, Leo thought. I'm in labor! How could I not have known I was? I knew with the others. The cramps became even stronger and Leo had an overwhelming desire to push, so he pushed with all his might and it wasn't long before a perfectly, round egg sat at his feet. Panting heavily, Leo thought, please let that be the only one.

Alex found Don and Casey and Don immediately went in search of Leo. "Leo," Don said, when he'd found his mate. "Leo, are you all right?"
"Egg," Leo gasped. "Labor."
Don looked at the egg and said, "Shh. It's okay. We need to move, Leo, before it gets dark. Come."
"No, can't move. Got to stay here. Hurts to…."
"It's okay, Leo. I'm here," Don said, grabbing his hand. "I'm here."
"Don, I think there's another one coming. GAH!"
"I'm just going to get some water to cool you."
"Don't leave me!"
"I won't…" Don got out his T-phone and told Casey where he was. He came running with a cold cloth, which Don used to wipe Leo's forehead. "Shh, Leo," Don said. "I'm here and I love you. It's okay. Everything's fine."
"ARGH!" Leo screamed. "Hurts so badly. Don, how can I not have known I was gravid?"
"It sometimes happens, Leo. Shh. Just relax. Breathe in, okay? It's going to be okay."

Four hours later, Leo finally dropped another egg and to his immense relief, there were no more. The egg was much smaller than the other one, which worried his parents. "Not good news, Don?" Leo asked anxiously, running his hands over the smaller egg.

"I don't know, Leo. We'll know when it hatches. In the meantime, we need to cover the eggs and we may have to stay here until they hatch."
"I'm cold, Don."
"Come, Casey. You take the eggs. Be careful how you hold them. Yes, hold them like that and don't drop them. Come on, Leo. I have you," Don said, picking up his mate bridal style. "Let's get you back to the cabin."

The trio headed back to the cabin. April had fed the kids and put them to bed. Don carried Leo to their bedroom and helped him into bed. "Sleep, Leo," he said, kissing his beak. "What about the eggs?"
"Casey, put them in this box over here and I'll cover them with a blanket, but tomorrow I need you to see if you can get some incubators from a hospital."

Casey did as he was told and said, "Don, you guys need anything?"
"Leo?" Don asked. "You want some food?"

"Just sleep, Don," Leo said wearily. "Food later."
"No, food now, Leo. You need to eat."

"I'll be back in a few minutes," Casey said. "April made some stew yesterday. I'll heat that up."

"Stay awake, Leo," Don said. "Casey will be back in a few minutes with some supper."
"I'm so tired. Are the eggs okay?"
"They're here in this box, Leo, and they're going to be okay. I promise. You thought of names?"
"Raphael and I don't know."
"How about we name the bigger egg Leonardo Yoshi and the smaller egg Raphael Firenzi?"
"You would do that?"
"Of course I would. I think Raph would love that. I bet he's smiling right now at the idea."
"You're wonderful, Don. Have I told you how much I love you?"
"Love you too, Leo," Don said, kissing his beak. "So, so much. And thank you for giving me two more children. I can't wait until they hatch."

Casey returned with two steaming bowls of stew. Don helped feed Leo his and wolfed down his own. Then the two mates snuggled down to sleep, hands entwined, worn out after such an exhausting day and the unexpected additions to their family.

A/N This is for my guest, who asked me to write this story. Hope you like it. And Eiri and Kurama lover07, here's a story where Don isn't a villain. Hope you find it okay. :)