Mabel decided to wear an off the shoulder blue dress with high heels. She puts her hair up in a ponytail and does her make-up. She goes downstairs to see Kyle waiting for her on the bottom step, "Ready to go, m'lady?" He holds out his hand. She nodded and took his hand. They walked out and headed to Greasy's Diner. They walked in and took a seat, a lady walks up, "Hello, What would you lovely couple like today?" She asked smiling. "We would like some chili cheese fries and 1 large milkshake with 2 straws" Mabel replied. "Coming right up" The lady walked away. They sat there silently, Mabel spoke up, "Thanks for taking me out. I haven't had any good relationships with guys before I met you" She grinned "You're welcome, I myself haven't had it good with girls either before I met you as well" Kyle winked. The lady brought their food to them, they both said "thank you" and dug in. *Warning: smut ahead* Bill and Cartman had been in the woods of Gravity Falls for hours, but in their minds, it was only minutes. Cartman had Bill pinned against a tree, shuffling around in his dress shirt. "I'm not a homosexual" Cartman whispered into Bill's ear, sending shivers down his spine. It didn't really appear that way, as they were both nude aside from the vest Bill were. Cartman subtly shoved his soaked dick into Bill's anus, making him jump slightly. Bill grunted, wincing as Cartman thrusted his body back and forth. Bill managed to nuzzle up in Cartman's neck, putting one hand in his brunette hair. "Wow...y-you're mighty good at this Red-Coat" Bill managed to murmur as Cartman nipped at his neck. Before much else could be done, Bill swiftly assured dominance. He pinned Cartman against the tree with a quick spin. Cartman didn't seem to care as he continued to latch onto Bill's neck. Bill, with no hesitation shoved his dick into Cartman's, Giving him a taste of his own medicine. Bill summons his cane, and he puts it around Cartman's neck and pulls him closer to his body. "But I think I'm better~" He teased. Cartman let out a small "fuck you" to Bill, his body practically melting. Suddenly there was a rustle heard from the bushes, adverting Cartman and Bill's attention. Cartman only managed to slip on his hat, and Bill didn't even bother. Mabel and Kyle appeared, much to the dismay of the two homosexuals. Cartman and Bill clung together, both having silent "who could hug tighter" battles. They were both still wet as Mabel and Kyle looked at them with eyes as wide as owls. "Holy-" Mabel said, her expression pale and surprised. "Shit" Kyle breathed out, completing her sentence. "Why hello, Shooting Star, Kosher Boy. Cartman was just giving me my side of the deal~" Bill smiled devilishly. "Look you guys can't tell anyone about this!" Cartman shouted quietly. Suddenly a evil smirk creeped on Kyle's face, "Well, if you will be nice to me and everyone else for the rest of the summer, then maybe I'll keep your "dirty" little secret~" He crossed his arms. "Yes, I promise I'll be nice to you!" Cartman screamed happily. "Alright, you got yourself a deal but if you say one mean thing to anyone, I'll tell everybody you basically got fucked by a male demon" Kyle threatened. Cartman nodded and smiled, "Wow, Bill's pretty hot in human form!" Mabel thought dreamily, but of course Bill read her mind. "Thank you, Shooting Star. You don't look too bad you yourself~" Bill flirted. "Stop reading my mind, Bill!" Mabel blushed. Bill grinned while Kyle looked like he was about to attack him. "Oh, come on, Kosher boy. Don't be upset, we're just having a friendly conversation..~" Bill cooed.  "Please, both of you just put your clothes back on!" Mabel begged. They both obliged while Mabel and Kyle started to walk back to The Mystery Shack. "Well, I better go back to the mind scape now" Bill looked into Cartman's eyes. "Do you really have to?" Cartman asked sadly. Bill nodded and wrapped his arm around Cartman's shoulders, "Yes, but I promise I'll visit your dreams tonight~" He purred in Cartman's ear. Cartman gave him one last kiss and Bill teleported away. Cartman walked back holding his head down. He walked in and saw everyone eating dinner, he grabbed a plate and sat down. "Are you guys dating, now?" Dipper asked Mabel and Kyle. Mabel snuggled up to Kyle, and yelled "Yes!" Everyone smiled and continued eating, The guys and Mabel decided to go to the attic and play truth or dare. After 2 hours of embarrassment, they went to bed. Stan, Kyle, Kenny, and Cartman all thought "This is going to be the best summer ever"