Chapter Text
Morning light filtered through the lair’s skylights, painting the floor in soft amber hues. The air buzzed with anticipation — Leo was heading out with Sam for their “brother day,” a plan that Donnie himself had suggested the night before. He tried to focus on that fact — that this was his idea, his choice — but the tightness in his chest said otherwise.
Leo bounced on his heels near the entrance, twin katanas strapped loosely to his shell. “Alright, Dee,” he said, flashing his signature grin. “You sure you’re good?”
Donnie stood a few feet away, arms crossed but not out of irritation — more as a self-hug. “Positive,” he said, forcing a confident tone. “You’re allowed to have fun, Nardo. I’m not going to spontaneously combust in your absence.”
Leo smirked softly. “Well, let’s not test that theory.” He stepped closer, dropping the bravado as his expression softened. “I’ll text when we get there, okay? And I’ll be back before dinner. Promise.”
Donnie nodded, his throat bobbing. “Okay.”
There was a small, awkward pause — the kind that existed between two hearts that didn’t quite know how to say I’m scared. But Leo broke it first, pulling Donnie into a tight hug that left no room for air, just warmth and heartbeat and brotherhood.
“Love you, Dee,” Leo whispered into his shoulder.
Donnie squeezed back just as tight. “Love you too, Nardo.”
When Leo finally pulled away, Sam gave Donnie a reassuring nod. “We’ll be back soon, Donnie. Take care of yourself, okay?”
Donnie mustered a small smile. “You too, Samuel.”
Then they were gone. The door closed, and the quiet that followed felt heavier than it should have.
The day passed in waves.
Raph, Mikey, and April had all made it their mission to keep Donnie busy — movie marathons, a quick run to the surface for supplies, a round of video games, and even an impromptu sparring session with Raph that left the dojo echoing with laughter.
Donnie laughed too, genuinely. But every so often, his eyes drifted toward the lair’s entrance. The space beside him always felt a little too empty.
He tried to keep his hands busy — tinkering, adjusting, anything to distract himself — but the moments of stillness were the hardest. That’s when the panic tried to slip through the cracks, whispering what-ifs into his mind.
What if something happens? What if he doesn’t come back on time? What if—
No. He stopped himself. He wasn’t going to spiral. Not today.
But even with all his logic and reason, the ache in his chest stayed.
It didn’t take long for Raph to notice. “Hey, genius,” Raph said gently, nudging him with an elbow as they sat together on the couch. “You okay?”
Donnie hesitated before sighing, “I’m trying. Really trying. But it’s… harder than I expected.”
April, sitting cross-legged across from them, gave him an encouraging smile. “You’re doing amazing, Donnie. The fact that you can admit that you’re struggling? That’s huge.”
Mikey chimed in, leaning forward with his usual soft energy. “Yeah, dude! You didn’t call or text him even once — that’s major progress!”
Donnie blinked at them, surprised by the pride in their voices. “I… suppose it is.”
Raph slung an arm around his shoulders. “You’re not gonna fix everything overnight, bro. Healing’s not a sprint — it’s a marathon. You just gotta breathe through it, yeah?”
April nodded. “When the panic starts creeping in, try grounding yourself. Remind yourself where you are — who you’re with. You’re safe, Donnie. Leo’s safe. You’re both okay.”
Donnie nodded slowly, taking a deep breath. “I’ll try.”
“Atta boy,” Raph said, ruffling his head.
And so they spent the rest of the afternoon together — laughing, snacking, talking. The ache never fully went away, but it dulled. And for the first time since the invasion, Donnie felt like he wasn’t battling it alone.
By the time Leo and Sam returned, the lair was calm and warm. Leo’s laughter echoed through the hall as he put up his swords, looking around for his baby twin.
He spotted Donnie first — sitting with Mikey on the couch, mid-discussion about some new upgrade for the Battle Shell.
“Hey, Dee!” Leo called.
Donnie turned, and for a brief moment, Leo expected his twin to rush him, to cling to him like before. But Donnie just smiled — small, but real. He didn’t move.
It was Leo who crossed the room instead, wrapping Donnie in a hug before he could react.
“I missed you,” Leo said softly against his shoulder. “But I’m so proud of you, Don.”
Donnie exhaled shakily, returning the embrace, his lips quirking up in a small smile. “I missed you too. But I… managed.”
Leo pulled back just enough to look him in the eye, a radiant grin spreading across his face. “You did manage. Look at you — I leave for a few hours and you didn’t implode. You even had fun!”
Donnie rolled his eyes but his cheeks were warm. “Well, I had good company,” he said, glancing toward their siblings, who were all quietly grinning.
Leo laughed softly and cupped the back of Donnie’s head, pressing their foreheads together. “You’re doing so well, Dee. One step at a time, yeah?”
Donnie nodded. “Yeah. One step at a time.”
He knew he wasn’t cured — not even close. The fear was still there, the guilt still clinging quietly to the corners of his mind. But tonight, as he leaned into his brother’s arms surrounded by warmth and laughter, he allowed himself to believe that maybe — just maybe — he was moving forward.
And for now, that was enough.
.
.
.
The lair had fallen into its soft nighttime rhythm — the hum of the lights dimmed, the distant whir of the filtration system echoing through the tunnels, and the comforting quiet that always followed a long day.
Leo’s room was a sanctuary in the dimness, washed in the cool blue glow of the string lights that trailed along the ceiling. The twins were curled up together on Leo’s bed, the twin-sized blanket barely containing the two of them. Donnie lay with his head tucked under Leo’s chin, listening to the slow rhythm of his older brother’s heartbeat — steady, grounding, real.
For a while, there was only silence. Then Donnie spoke, voice soft and fragile in the stillness.
“I’ve been thinking,” he murmured.
Leo hummed in response, a quiet “Mm?” against Donnie’s head.
“About today,” Donnie continued. “About… being apart from you.”
Leo’s arms instinctively tightened around him, but he didn’t say anything yet. He waited — letting Donnie find his words, as he always did when it came to serious conversations.
“It was hard,” Donnie admitted finally. “Harder than I expected. There were moments where I wanted to call you, or text, or… do something to make sure you were still out there.” He paused, breathing out shakily. “But I didn’t. I stayed with Raph and Mikey and April. I distracted myself. I even had fun, Leo. Real fun. But at the same time, I couldn’t stop feeling this—” he pressed a hand against his plastron “—this constant ache here. Like a part of me was missing.”
Leo nodded softly, his chin brushing the top of Donnie’s head. “That makes sense,” he whispered. “You’ve been through hell, Dee. Heck, we both have. You’ve had to live with the fear of losing people — especially me. It’s not something you just… turn off.”
Donnie’s voice trembled. “I thought it would feel like progress, but it just felt like distance. And I hated it. I know I’m healing, and I know I need to learn how to exist without panicking when you’re not next to me, but…”
He swallowed, his eyes glistening as he turned slightly to look at Leo. “What if I can’t ever get there? What if I’ll always need you this much?”
Leo’s expression softened, his heart aching at the vulnerability in Donnie’s voice. He reached up and gently cupped his baby twin’s cheek, thumb tracing small circles against his skin.
“Then I’ll always be here,” Leo said, voice thick with emotion. “Because needing me isn’t a weakness, Donnie. It’s just love. And love doesn’t have to be logical or convenient. It just… is.”
Donnie blinked at him, tears welling but not falling. “You make it sound so simple.”
Leo smiled faintly. “It’s not simple. Not even close. But I meant what I said — we go slow, and we go small. If it takes weeks, months, years — I’ll walk every step with you. You don’t have to force yourself to be okay just because you think you should be.”
Donnie’s lip trembled. “You really mean that?”
“I really mean that.”
The silence that followed was tender, filled with everything words couldn’t carry. Donnie let out a long, shaky sigh and leaned forward until his forehead pressed against Leo’s.
“Thank you,” he whispered. “For today. For… everything. I don’t think I would’ve made it through without you.”
Leo smiled gently, brushing a tear off Donnie’s cheek with his thumb. “You give yourself too little credit, Dee. You made it through because you’re strong — not because of me.”
Donnie gave a soft, watery laugh. “Maybe. But it helps when my other half is cheering me on.”
Leo chuckled quietly, tugging him closer until Donnie was snug in his arms once more. “Then I’ll keep cheering until you don’t need me to anymore.”
Donnie’s voice came out muffled against Leo’s chest. “That’s never going to happen.”
“Good,” Leo said with a sleepy smile, pressing a kiss to the top of Donnie’s head. “Because I like having you around.”
Donnie snorted softly, his body finally relaxing as the tension began to fade. “I like being around too.”
“Glad to hear that baby,” Leo echoed again, his voice gentle, rhythmic — a lullaby more than a word.
They lay in silence after that, the faint hum of the lair blending with the evenness of their breathing. Donnie’s eyelids grew heavy as Leo absentmindedly rubbed small circles into his shell.
“Night, my Nardo,” Donnie whispered, barely conscious.
Leo smiled, eyes half-lidded. “Night, my Donnie. My precious baby twin”
And just like that, they both drifted off — two halves of the same heart, wrapped in warmth and trust, ready to face tomorrow’s steps together.