Leonardo paced nervously in the lab, his shell brushing the counter as he kept his eyes on Donatello, who was focused on his screen. Leo was used to Donnie's genius, but this was different—he wasn’t used to the idea of becoming a father.

It had all started with a conversation between you and Leo, about how much you both wanted a child. Despite your deep bond, his mutation posed a major challenge. Adoption seemed like the obvious choice—safe and simple—but then Donnie offered a scientific solution.

"You two want a kid? Let science help," Donatello had said casually. "I’ll create two embryos—one with your DNA and Leo’s. It'll be perfectly safe, I promise."

Leo immediately jumped at the chance, excited by the idea of something more personal than adoption. Since then, he'd bugged Donnie daily.

"Any updates?" Leo asked, trying to hide the tension in his voice.

"Leo, I told you yesterday—the embryos are developing normally," Donnie replied, still focused on his screen. "One’s growing in the shell, the other is stable in the tank. Science takes time."

Leo nodded, turning to you with a grin, though you could see the anxiety behind it. "See? Donnie's got this covered."