Manufactured Misfortune/Day1-Anatomy Replace Towel and Greet
Eyeing her towel on the counter, you creep into the room, keeping one ear open for the sound of water falling off Emily's body to know she isn't about to come out. Mere feet from the shower you examine her towel without touching it, saddened to see that it's one of the lager one's she typically wears. However, that won't stop you now. You pull out your phone and take a picture of how the towel is positioned before grabbing it and making your way back into the hall.
Towels are kept in the laundry room in the basement so you make your way there as quickly and quietly as possible, swap it out for a much smaller one, and dash back upstairs. Carefully entering the bathroom once again you use the picture you took to perfectly reposition the tinier white towel. Compared to your picture the size difference is obvious, but you've read before how simple differences like size or color are very easy for the human mind to overlook when two items are swapped.
Plus, this is the same girl who failed to notice her clothes falling off two days in a row. You'll be fine.
Once the towel is set up you head back to the door and position yourself to look like you just leaned in and, after enjoying the sound of her singing for a few more moments, speak up.
"You have a lovely singing voice!" you holler to be heard over the water.
A startled yelp comes from behind the curtain and a second later Emily pokes her head out from the shower, her hair still all soaped up, holding the shower curtain to her chest. You lean back against the door with a shit-eating grin on your face.
"Ha ha, very funny Ron!"
"All I said is you have a lovely singing voice!"
"Well, firstly thank you," she flashes you a smile. "But you didn't have to startle me like that! I thought you weren't coming home for a while?"
"I said I needed to take care of something and not to wait for me, not that I would be home late. Is that why you left the door open, you didn't think I'd be home yet?"
It seems she'd rather not admit to that, so you consider it a victory when she ducks back behind the curtain. When she does speak again she changes the subject.
"I'll finished up soon so you can get a shower next."
"You don't have to, I took a quick shower after gym. Besides, you probably won't leave me any hot water."
You give her a snarky remark and in response you hear a light smack from behind the curtain, presumably from Emily smacking her ass in a nonverbal "screw you." You laugh, but rather than leave choose to continue the conversation.
"So, how was school for you?"
It would seem your sister saw no problem have a conversation with her brother while she was naked in the shower with only a thin curtain between you, as she responded immediately.
"Well, there was this incident in gym where my top came off, but lucky for me a handsome knight was there to protect this maiden's modesty," she said in an overly dramatic fashion, coaxing a smirk from you.
She continued in a normal voice.
"Other than that, pretty normal."
You both continue like that for the remainder of her shower, casually talking about school and what not. Throughout all this you steadily became more and more aroused, hearing the water falling from her petite body, seeing the occasional bump against the curtain. Knowing she was naked right there was driving you crazy. You had to readjust your dick into a more comfortable, and more discreet, position, and struggle to keep from whipping it out and jacking it right then an there. Eventually though the water's turned off and Emily pokes her head back out once again.
"Um, Ron? Could you give me some privacy please?"
"Sure thing Em. I was gonna make a snack since mom and dad won't be home till late again, you want something?"
"Just a sandwich, if you'd be so kind."
You nod and exit the bathroom, leaving the door wide open. Emily doesn't say anything, and after you hear the curtain slide open, you still don't hear the door close. You smiled to yourself thinking of how she has no problem leaving the bathroom open while she dries off. She certainly is becoming more comfortable around you. You go about making two sandwiches and set them on the table, about to dig in when Emily descends the stairs.
Just as you hoped, she's wearing the smaller towel without complaint. It looks just as good on her now as it did this morning, clinging to her form to perfectly accentuate the curves of her slim figure, displaying a fair amount of cleavage, and leaving her legs completely bare. Her pussy and ass were just barely covered by the damp cloth, and if she bent over even a little her goods would be peaking out behind. She smiles at you while making her way over.
"Thank you, Ron!" she says while sitting down across from you.
You smile and nod as you both eat, eyeing your towel-clad sister all the while. As you eat it occurs to you that maybe she had the bigger towel before since she thought she'd be done before you got home, and that she's fine in the smaller one since she can show off to you. It's likely, you'll admit, but still you're left with a bit of doubt. If she does the same thing tomorrow morning as she did that morning, you'll have an answer.
Despite the erotic sight before you, your mind drifts. You planned to spend the afternoon with Emily, now there's just one question.
How?