Your sister Kim walks in

Original Author: Starlock

"Hey, sis! Wakey, wakey!" Kim shakes Alice awake. Alice yawned, giving her older sister a rather annoyed expression.

"Why'd you wake me?" She grumbled.

"Why else? You do remember what today is, right?" Kim reminded her.

"Ooh! We're starting right now?" Alice smiled, bouncing slightly with excitement.

"Yeah. Me and mom have been waiting so long for you to turn 18. Now you can finally join in. So why not start right away." Kim grinned, taking off her shirt and undoing her bra.

"What??!" Will thought, blushing lightly. "What the hell are they talking about!??"

"Can I?" Alice pointed to her older sisters tits.

"You don't need to ask Alice. Just go for it!" Kim responded with a little giggle.

Giggling herself, Alice started playing with her big sister's boobs. "Soft and squishy! They are making me feel so hard."

"Don't get too excited." Kim smiled. "I'll let you be on top for your first."

"Yes! Best morning ever." Alice giggled, taking off her pajamas. "Can I do you from behind?"

"Okay. But please no anal. At least this time." Kim said, turning around and pulling her pants and panties down together.

"Kay!" Alice agreed, now donned only in her panties.

Now, Will was officially weirded out by what he was seeing. There was no more denying it now; his sisters were about to have sex with each other! And it got even weirder when Alice pulled down her panties, and a dick, a penis, usually reserved for males, stood straight up from her crotch!