One that will leave you both soaked

Hannah gives you a puzzled look when you pick up the glass of water and hold it there without taking a swig. “Here goes nothing” you say more to the air than your sister, just psyching yourself up.

You instinctively close your eyes as the water splashes against your chest. When you open them, your sister is blushing hard and staring at your tits. The doused fabric hides nothing now, and the cold water is hardening your nipples. That seems to be a good enough display to leave Hannah speechless.

“Go ahead, look all you want” you encourage her. “I’m not angry, just a little uncomfortable.”

Hannah’s eyes flick up to meet yours. “Sorry… again” she squeaks out before going right back to your chest.

“It’s okay.” You console her, cupping her cheek. “I’d much rather you stare at me and owe me a favor than hurt yourself trying not to.”

She looks at you again, some of the aroused excitement fading from her face. “Right, yeah, so, what’s the favor?”

You can’t help the smug grin that crawls out of you. “I know what you do after you get spotted and scurry away. You take a picture in your head and think of it while you relieve the tension back in your bedroom.”

Hannah squirms at the call-out, but doesn’t contradict your claim, only correcting you that “sometimes I take a literal picture.” The reminder throws you off your rhythm enough that you just stare back at her for a few seconds. “I know! I know. I deleted all the ones of you last night.” You’ll just take her word on that. If there are any doubts, it’s not that hard to hack into a filesystem when it’s using the same router as you. “I’m still unclear on what the favor is?” She prompts.

Getting back on track, you instruct her that “I want you to follow your usual routine, but leave the door open this time.”

After a moment of silence, you can see relief wash over her. “Oh, that’s it? I was gonna do that anyway.” Her face tints red once again, this time looking more shy and embarrassed. “Leave the door open, I mean, not… the other part.”

Her addendum leaves you a bit confused. “I thought you meant the other part. You never leave your door open.”

“Well, I’m starting today,” she explains. “It wouldn’t exactly be fair for me to peek into your room and not expect you to have a look in mine.”

“Oh wow, big change. Where have you taken my sister?” you tease.

“I mean it’s not That weird, plenty of people don’t lock their bedroom door” Hannah says, before realizing the implications of that and hiding her face. “Anyway, I’ll do it, just give me a minute to deal with this before you get your peep on.” Hannah requests while gesturing at her tear- and make-up streaked face.

You nod in agreement. “I need to get ready too, be in your room in five?”

Hannah looks at you quizzically. “Sure…?” she hesitantly asks, stretching the word while getting up to go clean her face, not waiting for a reply.