Ok, so this one's not very good but I had an idea and this is what I ended up with:
Out Of Snacks
They were all hanging out at Marinette's house. Alya and Nino shared a glance, readying themselves for their genius plan.
"Oh would you look at that." Alya said in a less than convincing distressed voice. "It seems to me that we are out of snacks!"
"You are right Alya." Nino said in a similar tone. "You and I should go to the kitchen and get some more." Standing, Nino glanced at his girlfriend before returning his attention to his two oblivious friends. "We will be back soon, you guys stay here." With that the pair left, leaving Adrien and Marinette alone.
"Now let's see if anything will happen between them." Alya whispered, ducking inside the door frame. A mischievous grin spreading across her face.
Marinette let out a sigh of relief. Once her friends were out of sight she leant against Adrien, resting her head on his shoulder. He wrapped an arm around her waist and kissed the top of her head. "I've been waiting all day to do this." She complained, tracing circles on his hand with her thumb. "Me too, but you know we can't tell them." Adrien replied. "Not yet at least."
"I know." Marinette groaned, burying her face in his shirt. Adrien held her chin and tilted her head up to look at him. "At least we have each other." He said with a sappy smirk, eyes locking with hers then wandering down to glance at her lips. "Yeah…" Marinette breathed, before grabbing his shirt collar and pulling his lips to hers.
Nino and Alya stood stock still, gaping at the scene before them. Not too sure of what they were seeing. Slowly they started backing away, turning to the kitchen to get the snacks they had said they would before they saw too much.
(Haha that was horrible)