Hot Summer Job/Move your face up to hers
You stare slightly at your little sister's lips.
Unbidden, the dare comes out of your mouth. "I dare you to kiss me."
Bree nearly glows red as she blushes deeply.
"On the cheek?" She looks at you hopefully, only for her hopes to be crushed as you shake your head. You point to your lips with an air of authority, some small part of you enjoying her indecisive look. Gathering her courage, she cranes her neck forward. Your eyes close reflexively as her face comes nearer. Something brushes against your lips. You open one eye to see Bree smiling mischievously as she starts to back away, but you grab the back of her head and pull her closer.
"Not like that, like this!" You pull your little sister into a deep kiss, tongues swirling in each other's mouth.
Bree's breath is shaky, alternating between her nose and her mouth as her lips press into you over and over. She bucks her hips into your hand, perhaps involuntarily, as she loses herself in your embrace. Her passion is infectious, your cock throbbing and pulsating beneath her. Your fingers start up again, circling against the front of her slit, eagerly seeking her clit. She gasps and kisses you harder, closing the tiny gap between you that much further and ensuring that a little bit more of your bodies are making contact.
But you make contact somewhere you weren't expecting. Your throbbing cock pulls up higher and higher until your head taps against the underside of your sis. Your dick touched your little sister's ass. The shock makes your hands clench, pulling a finger right up into Bree's clitoral hood until it pops past it forcefully.
"EEEEP!" Bree yelps, leaning back and breaking your kiss before a shiver runs through her body. That shiver causes her to slump forward into your chest just as fast as she pulled away. You scramble to swing your free hand under one of her thighs to better carry her weight. You very nearly dropped her, the short spasm loosening the tight grip her legs had around your waist.
The two of you remain still for a moment, lightly panting in each other's embrace trying to compose yourselves. Bree's slump also managed to lower her body an inch or two bringing the same butt cheek to rest against the tip of your stiffened cock.
"Well..." starts Bree, slowly leaning back under your support. "That was a pretty good dare. What's next?"