"Phineas, you did it! You saved all of our dimensions!" sighed Isabella happily , putting the cap on her laser pistol as she slouched down, smiling widely. The fight had taken a lot out of them all, especially Phineas. But at last, the universes were saved.
The dimensional warp vortex was slowly inclosing its mass, becoming smaller and smaller by the minute. Everyone said goodbye to their counterparts as they stepped into the vortex one by one. Alt. Isabella was about to enter through the hole, looking a little nervous.
"Guys...I'm a little scared...What if I never get to see you guys again?" Alt. Isabella asked with eyes full of tears, collapsing on her counterpart sadly. She had grown to like her new alternate friends. She didn't want to leave. Not now. Not during the fight with Alt. Doof. Not ever.
Ferb slowly walked up to her silently, and gently and carefully wiped the tears out of her eyes, smiling weakly. He was also drained from the battle, but he didn't care. All he cared about was the woman in front of him. He put an arm around her gently, tears starting to form in his eyes as well. Alt. Isabella looked up at him, looking confused.
"F-ferb, what a-are..."
She was silenced with the most passionate, hot, and inexperienced kiss that Ferb could muster. Alt. Isabella seemed to attempt to stop at first, but stopped resistance after a few seconds.
This would make her leaving all the harder.