"Dare me to do something, Dustin." Ty replies, smiling like he knew something that his foster brother didn't. "Don't hold back now.."
"Sh-shut it!" Dustin snaps back and quickly thinks of a dare, looking back out the window for a brief second before finally thinking of something. "I read on one of the chat boards that the pink mist that's been spreading makes you super horny. I dare you to get a quick whiff of it."
Ty chuckles at the dare, having already wished himself to be immune to the pink mist. What would it feel like to not be immune to it? The thought interest him enough to accept the dare, walking over to Dustin to step beside him next to the window.
"Okay I'll do it." Ty said as Dustin steps away and covers his face with a painters mask he took from the garage. A small fog of pink mist was just about to pass by the house, perfect timing for the dare he thought. The younger teen took in a deep breath and wish for himself to not be immune to the pink mist anymore, breathing out before cracking open the window halfway. Ty sticks his head out and inhales deeply, making sure to get as much of the pink mist into his lungs before pulling back in and slamming the window shut. The effects kicked in almost immediately, letting out a moan as his whole body got really sensitive with pleasure. "O-ohh man!" Ty was masturbating furiously, having never felt so much pleasure and sensitivity in his life. The feeling was too good to be described in complete sentences.
Dustin watches on as he takes off his mask when noticing none of the mist got into the room, being extremely aroused seeing his foster brother succumb to such a weird anomaly. He was completely unaware that he was stroking his own cock at a fast pace as well, completely turned on by his brother now.
Ty's other hand reached around to start fingering his own asshole, prodding his prostate for a 10 times increase in pleasure, making the 15 year old yell loudly in pure bliss with his tongue hanging out. He has lost all other senses and train of thoughts, and now just wants to experience sexual pleasure to the max. "F-FUUUCK THIS FEELS SO GOOOOOD! THANK YOU FOR MAKING THIS DARE DUSTIIINNN!" Ty cums hard, bucking his hips in a wild manner as rope after rope of jizz shoots all over the room. Some of it landed on Dustin's chest, making the teen wipe it off as curiosity forced him to lick it from his fingers. The taste made him shiver with delight, the feeling of being disgusted by all this was long gone now.
Ty pants and stops stroking his cock and removes his finger from his ass, taking a moment to breathe. Suddenly his body starts convulsing, as if it was about to change.