"Alright, guys, we only got one chance at this!" Mabel told both Dipper and Soos.
"We got enough film in the camera Soos?" she asked the man-child.
"A whole roll, hambone" he replied.
Dipper was unsteady on Mabel shoulders and she frowned at this.
"Stop squirming Dipper!" She snapped at him.
Dipper tried to straighten himself out without moving.
"A-are you sure you have a good hold on me?" Dipper asked his twin sister "I don't wanna fall."
"You WILL fall if you don't stop moving, Dip!" she told him.
Finally, what they had all been waiting for happened; Wendy walked in. Wendy was of course, confused at what she saw.
"Dipper? Why're you on Mabel's shoulders?" she asked him, then saw what Soos' hands.
"Soos? Why're you holding a camera?" she asked him.
She heard Mabel stifle a giggle. Wendy smirked at this, realizing Dipper was now close to her height.
"Hmm... scrapbook-ortunity, Mabel?" she asked her.
Mabel nodded as well as she could with her brother on her shoulders.
"Well, whatever..." she said, and finally, after all they had done, Dipper's summer mission was accomplished; Wendy leaned over and kissed him directly on the lips.
In her mind though, Wendy didn't just do this for the heck of it, she had reasons behind it; Dipper had saved her from Robbie brainwashing her into doing whatever he wanted with her body, and he had saved the Mystery Shack so she didn't have to move upstate to her cousin's logging company away from all her friends. She kissed him for so long that Soos nearly used up the whole roll.