Stiles threw himself into his rehabilitation with determination, pushing himself to make progress with each passing day. With Derek and John by his side, he felt a renewed sense of purpose, knowing that he was not facing this journey alone. There were moments of joy and laughter sprinkled throughout their days. Whether it was sharing a meal together or simply spending time in each other's company, the bond between Derek and Stiles only grew stronger with each passing moment.

But there were also days with frustrations, uncertainty and fears that threatened to engulf Stiles, casting a shadow over his hard-won victories. Physically, he was on the mend. Mentally, however, that was a different story. But he also tried not to draw too much attention to his occasional memory lapses.

One afternoon, Derek found Stiles in the living room, a perplexed expression etched on his face as he stared intently at his phone. Concern pricked at Derek's senses as he approached his mate. "Hey, Stiles, what's going on?" He asked, his voice laced with genuine concern.

Stiles looked up, his brow furrowed in confusion. "I... I can't remember my passcode." He confessed, his tone tinged with frustration. "I've tried every combination I can think of, but nothing seems to work."

Derek took a deep breath, bracing himself for Stiles reaction. It could go two ways. "Stiles, your password... it's your birthday." He told Stiles softly.

A heavy silence settled over them as Stiles stared at Derek, his expression shifting from confusion to disbelief. "My birthday?" He echoed, his voice barely above a whisper.

Derek nodded, his heart aching at the raw vulnerability in Stiles' gaze. "Yes, your birthday." He confirmed, reaching out to gently squeeze Stiles' hand in reassurance.

Stiles' eyes welled up with tears, his emotions threatening to spill over. "I... I don't remember." He admitted, his voice choked with emotion. "How can I not remember my own birthday, Derek?"

Derek's heart shattered at the sight of Stiles' tears, his own eyes misting with unshed emotion. "It's okay, Stiles." He murmured, his voice tender and soothing. "It's okay to not remember. We'll figure it out together."

But when Derek reached out to comfort Stiles, he was met with a sudden outburst from his love. "It's not okay, Derek!" Stiles cried out, his voice cracking with emotion. "How can you say it's okay that I can't remember something as basic as my own birthday? It's humiliating! It's frustrating! It's... it's..."

His words dissolved into a choked sob, his shoulders shaking with the weight of his emotions. Derek's heart clenched at the raw pain in Stiles' voice, the depth of his anguish laid bare before him.

"I'm sorry, Stiles." Derek whispered, his own voice thick with emotion. "I didn't mean to minimize what you're going through. I just..."

Stiles shook his head, his tears flowing freely now, unchecked by pride or restraint. "It's hard feeling like this. It's so damn hard."

Drawing Stiles into a tight embrace, Derek held him close, offering silent comfort amidst the turmoil. "I understand, Stiles." Derek whispered, his own voice thick with emotion. "I see how hard this is for you, but I'm here for you."

~oOoOo~

One morning, as Stiles sat at the kitchen table and savoring a cup of coffee, Derek entered the room with a mischievous glint in his eyes. "Ready for today?" Derek announced, his voice filled with excitement.

Stiles raised an eyebrow, a curious smile playing at the corners of his lips. "What's up again?" He asked, intrigued by Derek's sudden enthusiasm.

Derek grinned. "It's time for those casts to come off." He declared, his tone filled with anticipation.

Stiles' eyes widened in surprise, a surge of excitement coursing through him. "Oh my god, yes!" he exclaimed, his heart racing with anticipation.

The wait in the hospital hadn't been too long, and before Stiles knew it, he was called into the room. As the last of the casts fell away, Stiles let out a triumphant whoop, his arm and leg flying free as he reveled in the newfound freedom of movement. He wiggled his fingers and toes, testing out his newly liberated limbs with a sense of wonder.

Derek watched with a smile, his heart swelling with pride at the sight of Stiles' joy. "Feels good, doesn't it?" He remarked, his tone filled with satisfaction.

Stiles grinned, nodding enthusiastically as he flexed his muscles. "It feels amazing. Weird, but amazing." He exclaimed, his voice filled with exhilaration. "I can't believe I'm finally free!"

Derek's heart swelled with a mixture of pride and relief as he watched Stiles,a sense of joy washing over him at the sight of his partner's elation.

"It's about time, huh?" Derek teased gently, his voice tinged with affection as he reached out to gently squeeze Stiles' hand. "You've been itching to get rid of those casts for ages."

Stiles chuckled, the sound filled with pure happiness as he nodded enthusiastically. "Itching indeed!" Stiles made a face, thinking back of the days his leg and arm itched like crazy. "But now that they're finally off, I feel like I can take on the world!"

Derek's smile widened at Stiles' enthusiasm, his heart swelling with love for the man beside him. "You already have, Stiles." He said softly, his voice filled with pride.

Stiles' grin grew even wider at Derek's words, a warmth spreading through him at the sincerity in Derek's voice. "Thanks, Derek." He said, his voice filled with gratitude.

~oOoOo~

As they made their way back to the car, Stiles couldn't shake off the surreal feeling of walking freely again, his arms swinging at his sides in sync with his steps. It was strange but undeniably liberating to be out of those confining casts.

With a grin stretching across his face, Stiles turned to Derek, a glint of mischief dancing in his eyes. "Now it's my turn to repay the favor." He declared, his tone filled with enthusiasm.

Derek arched an eyebrow, a hint of amusement tugging at the corners of his lips. "Oh? And what do you have in mind?" He asked, intrigued by Stiles' sudden eagerness.

"I want to cook you dinner." Stiles announced proudly, a sense of determination shining through his words. "A proper meal, made with love and all my newly regained use of all limbs."

Derek gasped in mock horror, a playful smirk playing on his lips. "Are you sure that's a good idea?" He teased, a twinkle of amusement in his eyes. "I quite like the kitchen intact, thank you."

Stiles feigned offense, placing a hand over his heart in mock hurt. "You wound me, Sourwolf." He joked, a mischievous glint in his eyes. "But just you wait and see. I'll show you my culinary prowess!"

Back at the house, Stiles wasted no time, bustling around the kitchen with a newfound determination. Derek leaned against the doorway, watching with a bemused expression as Stiles retrieved pots and pans from the cabinets, pulling produce from the fridge, and lastly taking the necessary ingredients from the spice cabinet. His mind clearly focused on the task at hand.

Just as Derek was about to slip away and give Stiles space to work his culinary magic, he noticed a familiar tension creeping into Stiles' shoulders. It was the telltale sign of forgetfulness.

"Love?" Derek called out gently, concern coloring his voice. "I can help you."

Stiles hesitated for a moment, his voice small as he replied, "No. I can do it myself."

Derek watched Stiles for a moment, his concern deepening as he observed the slight tremor in his hands. Despite Stiles' insistence on handling everything himself, Derek couldn't shake off the feeling of unease.

"Stiles." Derek began softly, stepping closer to where Stiles stood at the kitchen counter, his expression gentle yet firm. "You don't have to do this alone. Let me help you."

Stiles hesitated, his gaze flickering between Derek's earnest expression and the array of ingredients spread out before him. A part of him wanted to stubbornly push through, to prove that he could manage on his own. But another part longed for the comfort of Derek's support, especially in moments like these when his memory faltered.

With a resigned sigh, Stiles relented, a small smile tugging at the corners of his lips. "Okay." He conceded, his voice barely above a whisper. "I could use a hand."

Derek's smile widened, relief flooding his features as he stepped forward to join Stiles at the counter. Together, they worked in tandem, chopping vegetables, seasoning dishes, and sharing quiet conversations as they prepared the meal.

As the scent of cooking filled the air and the kitchen buzzed with activity, Derek couldn't help but feel a sense of contentment wash over him.

~oOoOo~

The next morning, Derek found himself lost in thought, as he sat across from John at the kitchen table in the Sheriff's home. A deep frown marred his typically composed features. He couldn't shake off the growing concern he felt regarding Stiles' increasingly frequent memory lapses.

"John." Derek began, his voice grave as he broached the topic that had been weighing on his mind. "I'm worried about Stiles."

John looked up from his coffee, concern etched in the lines of his face as he met Derek's gaze. "What's going on?" He asked, his tone serious.

"It's his memory." Derek explained, his words measured as he struggled to find the right way to express his concerns. "It seems like the lapses are happening more and more often lately. He tries to brush them off, but I can tell it's taking a toll on him."

John's brow furrowed in thought as he considered Derek's words, his expression mirroring the concern evident in Derek's own. "I've noticed it too." He admitted, his voice low with worry.

Derek kept his gaze fixed on the tabletop as he grappled with his own feelings of helplessness. "But I just can't shake off the feeling that there's something more going on. Something we're missing." He said, his voice tinged with frustration.

John leaned back in his chair, his expression thoughtful as he contemplated Derek's words. After a moment of silence, he straightened up, determination shining in his eyes.

"I think it's time we take a proactive approach." John suggested, his voice steady despite the underlying concern. "We should schedule an appointment with Dr. Clark, Stiles' neurologist. Get a professional opinion on what might be causing these lapses and what steps we can take to address them."

Derek nodded in agreement, relieved that John was taking the situation seriously. "That sounds like a good idea." He admitted, grateful for John's support. "The sooner we can get answers, the better."

John reached for his phone, his fingers moving with purpose as he dialed the doctor's office. After a brief conversation with the receptionist, he set up an appointment for the following day.

"There." John said, setting down his phone with a determined nod. "Appointment scheduled. We'll get to the bottom of this, Derek."

Derek felt a surge of gratitude for John's unwavering support. "Thank you, John." He said sincerely, his voice filled with appreciation, then his brow furrowed in thought. "The tricky part will be how to approach Stiles about it." He remarked, his voice tinged with concern. "He's been brushing off his memory lapses, and I don't want him to feel like we're ganging up on him."

John nodded in agreement, understanding the delicate nature of the situation. "We'll have to be gentle." He agreed, his tone thoughtful. "Maybe we can frame it as a routine follow-up appointment, just to check in and make sure everything's okay. That way, it won't feel like we're singling him out."

Derek considered John's suggestion, recognizing the wisdom in his approach. "That could work." He conceded, his expression softening with gratitude. "We'll just have to reassure him that we're doing it out of concern for his well-being, not because we think there's something seriously wrong."

John nodded, a reassuring smile on his lips. "Exactly." He affirmed, his voice calm and steady. "We'll approach it with care and sensitivity, and hopefully, Stiles will understand that we're just looking out for him."

~oOoOo~

Derek found himself standing outside their bedroom, a knot of nerves twisting in his stomach. He took a deep breath, steeling himself for the conversation ahead, before entering the room and finding Stiles sitting on the edge of his bed, engrossed in a book. He looked up, a bright smile lighting up his face as he saw Derek.

"Hey, Dereks" Stiles greeted warmly, setting the book aside. "What have you been up to?"

Derek took a seat beside Stiles, his heart pounding in his chest as he struggled to find the right words. "Just at your dad's." He began. "He reminded me we have an appointment at Dr. Clarks office tomorrow. Just for a check-up." He added as an afterthought.

Stiles' expression shifted, a furrow forming between his brows as he processed Derek's words. "Oh did we have an appointment?" Stiles said, feeling a sense of dread falling over him again as he seemed to have forgotten yet another thing. "And do we really have to? I just don't want to go back to more tests." He admitted, his voice tinged with reluctance. "I've had enough of hospitals and doctors poking and prodding at me."

Derek reached out, gently squeezing Stiles' shoulder in a gesture of reassurance. "I know you hate it." He said softly, his tone gentle yet firm. "But we just want to make sure everything's okay. Dr. Clark mentioned that sometimes there can be lingering effects from head injuries, and it's important to stay on top of it."

Stiles met Derek's gaze, searching his eyes for reassurance. After a moment of silence, he let out a resigned sigh, his shoulders slumping in defeat. "Okay." He relented, his voice soft with resignation. "I'll go back to see Dr. Clark."

~oOoOo~

Derek and Stiles sat side by side in the doctor's office, anticipation gnawing at their insides as they waited for the doctor to deliver the results of the additional tests that Stiles underwent earlier that day.

When the doctor finally entered the room, he was greeted by the anxious faces of Derek and Stiles. The doctor's expression was serious as he settled into the chair opposite them, a thick folder in his hands.

"Mr. Hale, Mr. Stilinski, I have the results of the additional tests we ran." The doctor began, his tone grave. "I'm afraid they've revealed some concerning findings."

Derek's heart sank at the doctor's words, a cold knot of dread forming in the pit of his stomach. He reached out and squeezed Stiles' hand, offering silent reassurance as they braced themselves for what was to come.

The doctor opened the folder and began to explain the results in detail, his words a blur as Derek and Stiles struggled to process the information. It felt like a whirlwind of medical jargon and unfamiliar terminology, each word only serving to deepen their sense of unease.

"As you know, we conducted a series of neurological tests to assess your cognitive function." The doctor explained, his voice steady despite the gravity of the situation. "The results indicate that there are abnormalities present in certain areas of his brain."

Stiles' breath caught in his throat at the doctor's words, his heart pounding with fear and uncertainty. "Abnormalities?" He echoed, his voice trembling with emotion.

The doctor nodded gravely, his expression sympathetic. "Yes, I'm afraid so." He confirmed. "Based on these findings, it's likely that the memory loss is the result of a neurological condition."

Derek's mind raced as he tried to process the doctor's words, a sense of dread settling over him like a heavy shroud. "What kind of condition?" He asked, his voice barely above a whisper.

The doctor sighed, his gaze flickering between Derek and Stiles. "We'll need to conduct further tests to confirm the diagnosis, but based on these initial results, it appears to be a form of early-onset dementia." He explained, his tone somber.

Stiles' heart plummeted at the doctor's words, a wave of despair crashing over him as he struggled to comprehend the magnitude of what he was hearing. "Dementia?" He repeated, his voice choked with emotion.

The doctor nodded, his expression grave. "Yes, I'm afraid so." He confirmed once more. "Based on the first tests results, it appears that the type of dementia is the same genetic form as your mother's. But as I said, we need further tests to confirm if it's indeed that."

Stiles felt as though the ground had been pulled out from beneath him at the doctor's words, a surge of panic and despair washing over him. His mother had suffered from dementia in her later years, and now, it seemed that he was facing the same fate.

"No." Stiles whispered, his voice barely above a whisper as he struggled to process the enormity of what the doctor was saying. "It can't be..."

Derek's heart ached at the raw pain in Stiles' voice, his own emotions threatening to overwhelm him as he tried to offer whatever comfort he could. "Could the accident have caused this?" Derek asked.

The doctor paused, considering their question carefully before responding. "It's certainly a possibility." He admitted, his tone measured. "Traumatic brain injuries, like the one Mr. Stilinski sustained in the accident, can sometimes exacerbate underlying neurological conditions."

Stiles' heart sank at the doctor's words, a sense of unease settling over him as he grappled with the implications of what he was hearing. "So, it's not just a stupid coincidence?" He asked, his voice tinged with resignation.

The doctor shook his head, his expression sympathetic. "I'm afraid not." He replied gently. "It's likely that the accident played a role in accelerating the progression of your condition."

Stiles' mind raced with a whirlwind of emotions as he grappled with the doctor's diagnosis. The weight of his condition bore down on him like a heavy burden, suffocating him with a sense of hopelessness. "I can't have this." He murmured, his voice barely above a whisper.

Derek's heart clenched at the despair in Stiles' tone, his own emotions mirroring Stiles' anguish. "We'll figure it out, Stiles." He vowed, his voice filled with determination. "We'll face this together."

But Stiles shook his head, his gaze haunted as he contemplated the harsh reality of his situation. "I don't want to be a burden." He confessed, his voice choked with emotion. "I don't want to put you and dad through this."

Derek reached out, gently cupping Stiles' face in his hands, his thumb brushing away the tears that stained Stiles' cheeks. "You're not a burden, Stiles." He insisted, his voice unwavering.

Stiles' breath caught in his throat as he met Derek's unwavering gaze, a flicker of hope igniting within him. "Oh my god." He whispered, his voice trembling with emotion. "We have to tell dad."

~oOoOo~

After the doctor gave them some information to take home, they drove to the Sheriff's house with heavy hearts. The weight of what they are about to tell him pressing down on them. They found John in the kitchen, his brow furrowed with concern as he watched them approach.

"Is everything alright?" John asked, his voice laced with worry.

Stiles and Derek exchanged a glance, a silent acknowledgment passing between them as they prepared to share the news with John. "We need to talk." Stiles began, his voice steady despite the turmoil raging within him. "It's about... about the doctor's appointment."

John's concern deepened as he observed the solemn expressions on Stiles and Derek's faces. "What happened at the doctor's?" He inquired, his voice tinged with apprehension.

Taking a deep breath, Stiles braced himself for the difficult conversation ahead. "The doctor ran some additional tests." He explained, his voice faltering slightly as he struggled to find the right words. "And... well, they found something."

John's eyes widened in alarm, his heart pounding with a mixture of fear and dread. "What did they find?" He pressed, his voice barely above a whisper.

Stiles glanced at Derek, silently urging him to take the lead. Derek met his gaze with a nod of reassurance before turning his attention to John. "Stiles has been diagnosed with early-onset dementia." He revealed, his voice steady despite the gravity of the situation.

John's breath caught in his throat, his mind reeling with shock at the devastating news. "Dementia?" He repeated, his voice tinged with disbelief. "But... but he's so young."

Stiles swallowed hard, his throat constricting with emotion as he struggled to maintain his composure. "It's... it's the same type that mom had." He admitted, his voice barely audible above the pounding of his heart.

John's expression softened with sympathy as he processed the implications of Stiles' diagnosis. "I'm so sorry, Stiles." He murmured, his voice filled with genuine compassion. "I can't imagine how hard this must be for you."

Tears welled up in Stiles' eyes as he met John's gaze, the weight of his father's understanding offering a small measure of comfort amidst the storm of emotions. "I don't want to be a burden." He confessed once again, his voice trembling with vulnerability.

John reached out, enveloping Stiles in a warm embrace as he offered silent reassurance. "You're not a burden, son." He insisted, his voice firm with conviction. "We'll get through this together, just like we always have."