A/N: Hey guys! Thanks a lot to Exotos135, Rebb R-001, EnergeticBullet, jolleIQ and Gigglebox15 for the reviews!
Hope you all enjoy this one!
I don't own Phineas and Ferb.

Isabella finally located her ringing phone, and hurriedly picked it up, seeing her daughter's name.

"Hello?"

She leaned against the chest of drawers, listening to the young woman.

"Yes, of course I've got time, what is it?"

She nodded a couple of times as her daughter monologued; when suddenly her face lit up. Isabella's eyes went wide as a broad smile graced her features.

"Oh my goodness, honey, that's wonderful!" she exclaimed. "I am so happy for you, really, I-" Isabella stopped, unable to find the right words. "No, I'm not crying... yet," she said, chuckling.

"It's awesome..." she kept repeating every once in a while, letting the news sink in. "Do you want to talk to Dad? All right, I'll pass him the phone."

Isabella covered the microphone and, despite her age, almost literally sprinted to the study where Phineas was, as always, hunched over blueprints. Isabella burst in and stood in the doorway, making him smile as soon as she came in. She then pointed at the phone with a huge grin still plastered on her face. She made a series of undefined gestures, finally just covering her mouth to prevent herself from laughing, and handed him the phone.

"Hello?" Phineas asked, still watching his wife in curiosity as she was obviously anticipating something (unchangeably, with an enormous smile on her face).

"Oh, hi sweetie pie!" he said enthusiastically. "Yes. Something important? Sure," he said, then fell quiet; Isabella could hear her daughter's lively chatter coming from the phone. She observed Phineas' expression change from interested to surprised, then immediately happy. Isabella watched with affection as he got up from his chair, uttering fragments of sentences with cheer. He glanced knowingly at his wife, now understanding her previous excitement; she smiled warmly in response. Finally, he gave the phone back to Isabella, who continued chatting with her child for a minute more.

"All right, honey," Isabella said, as the conversation wound down. "Once again, Dad and I are very happy. Yes. Yes. Bye!"

She put the phone aside and gazed at Phineas standing before her.

"So, what do you say... grandfather?" she said with a snicker. His expression became intrigued.

"Wow, you're right..." he uttered in amazement."We're now grandparents!"

"I still haven't really processed it," Isabella admitted, absentmindedly stroking Phineas' cheek. "I still feel... very young."

"Time sure flies fast when you're having a good time." Phineas smiled slightly. She abruptly pulled him into a hug, with a concerned face.

"Too fast," she said sadly, as if wanting to prolong the flow of time within their embrace.

Phineas wrapped his arms around her in a comforting cuddle.

"We're not dying yet, Izzy," he said softly, half-joking, half-serious.

She sighed. "I know. Just a moment of weakness."

"This is gonna be fun, as always." He started stroking her hair. "Like everything we have already gone through - childhood, puberty, college, marriage, children... It's gonna be the same with this slowly approaching oldness."

"I know. I don't care how difficult everything will be, as long as it's with you. I wouldn't be able to do anything without you." She tightened her embrace.

"Of course you would," he protested. "It's me who wouldn't do anything without you!"

"When you decide which of us is more dependent on each other, let me know." They both chuckled.

"Seriously though..." added Phineas, seemingly intending to add something more. "I really wanted to experience it all... I mean, life, in general, with you, so... all of it makes me so happy. I really love you."

"You know I think the same," she said in a soft voice. "I love you too."

They leaned into a kiss, a long and sincere declaration of willingness to stay at each other's side for as long as possible. As always, their kiss was filled with youthful passion, unceasing over the years. Life might slowly pass, but they would always simply banter with it, sharing another tight embrace with a lively sparkle in their eyes, getting lost in another blissful kiss. Those were the moments when no matter how much time tried to get in their way, it had no influence over them. The moments when they dictated the terms.

They broke apart, with warm smiles, prolonging the delightful while.

Isabella giggled, out of the blue.

"You were talking about our childhood... And I remembered something!"

"What?" he asked curiously.

"Our grandchildren!" she exclaimed and snorted with laughter, seeing her husband's confused expression. "Phineas! You had me at our granchildren!"

He finally understood what she was referring to and laughed heartily.

"See? You talked about our grandkids when we were kids! Apparently, when it comes to time, we make our own rules." He chuckled.

Isabella leaned closer again.

"Yeah..." she agreed, an inch away from his face.

"We make our own rules."

Thanks for reading and please review!
ElleFreak is out, peace!