Hot Summer Job/Move the sleepover into Bree's room
"Sorry, but a dare is a dare sis."
"But I'll be up there all alone while you're down here having fun!" Bree whines further. Is that what she's worried about?
"That's easy to fix. Just move the sleepover to your room."
"But I'd... have to be... naked at my sleepover..."
Bree's lips curl upward as the words exit her mouth. Suddenly she's giddy with excitement.
She runs away, bouncing and yelling "Come on! Grab your stuff!"
Kylie and Larissa hurry past you, the younger one giggling comically. They both snatch up their bags and run up the stairs behind your sister. You bring up the rear, trying to contain your own excitement.
As you peek past the girls in the stairwell you spot Bree, once again stripping in the hallway, But you don't get to see much as she's already ducked into her room by the time you all make it to the top of the stairs.
Larissa darts into your sister's room, followed closely by her sister. But your sis stops you when you try to enter, waiting for you behind the door.
"Sorry bro, you can't come in."
"What? Why not?"
"Because I'm naked!"
Stuck searching for a legitimate response to that, the door gets slammed in your face, laughter coming from the girls behind it. You wanted to get your sister naked again but you didn't want to get ejected from the sleepover in the process. Although maybe you were never really a part of it.
Grumbling to yourself, you pick up more of your sister's discarded clothing from the hall and head into your room. You make sure to leave your own bedroom door open so you can try to "keep tabs" on them.
You spot your sister's robe on the floor in the corner from when you rescued it yesterday. The new articles promptly join it. But it's only then that you remember Bree's panties. The ones you stashed under your bed after accidentally jizzing into them. As much of an accident as something like that can be. You contemplate taking them out, maybe finally doing something with them, but you lie back frustrated and grab your phone instead.
Short little bursts of giggles can be heard from your sibling's room which distracts you from the game you're trying to play. Until they turn on some music, which manages to cover up all but the most raucous of noises. But that distracts you even more.
Unable to concentrate on anything other than what's happening across the hall, you lay in your room for half an hour listening to their objectively shitty music before you get fed up with the boredom.