"Sssh. No more 'I need' from you. You and Natalie came to stay with me, in my house, and you behave like that, in my spare bed. Well, that's fine." Hannah was still touching Penny, stroking and fondling her body. "But there are rules. I'll be talking to Natalie when she gets back -- I heard her telling you about how rude she is and it is clear that she'd been spanked. But you, well, you've been bad too. You've been rude by getting my bed all wet and being dirty without letting me know."
Penny tried to interrupt again, but was cut short as Hannah slapped her across the face. The blow was not hard, but it shocked Pen to tears. "No interruptions, Penny. As I said, you were dirty without telling me -- well, for as long as you're in my house, then dirty leads to dirty, so I'll decide when you can be clean. If you want to go to the toilet, you can use your panties like Natalie apparently does. And you can keep them on, wet or messy, I don't care. If I find you've used the bathroom or changed clothes without my permission, the spanking you get will make the one you gave Nat look like a pat on the bum!"
As Hannah had hoped and suspected, Penny was a natural submissive, despite her spanking of their flame-haired step-sister. She simply stood, silent and aghast, fat tears rolling down her pretty face, as Hannah delivered this lecture. Encouraged, Hannah decided to roll with it. "In fact, you and Natalie are here for another week and I don't want to have to do laundry every day, or give you permission every night, so we'll need to make some very clear rules for both of you to follow. And maybe..." she smiled as another plan formed, "maybe we'd better get you some nappies."
"Please, Han, please..." was all Penny could choke out. But despite her protestations, she made no attempt to stop her older sister from stroking her body, and it was clear that her nipples were stiff with excitement.
"So, I think you came up here for the loo?" Hannah raised an eyebrow as Penny looked at the carpet, downcast. "Go on then." Penny made to break the hold Hannah had, moving towards the bathroom. "No! I think I was clear, Penny. I said: go on then."
"Nooo, please, don't," was all Penny could whisper, as she sobbed. But still she made no move to fight her sister, no move to stop her sister from running her hands across her breasts and bottom.
"Oh, of course, if you do go in your panties then you'll be punished for being a dirty baby, too," Hannah gleefully noted. "So either way the next week will be painful. If you go in your pants, you'll stay that way until I decide you can change. And then you'll be spanked. If you go to the toilet you'll be spanked and caned. On a night I'm putting you in nappies. In the morning, if you've used the nappy you'll be spanked. If you haven't, I'll have to assume you went to the toilet in the night so you'll be spanked and caned. But you won't be alone -- Natalie will get the exact same treatment."
It was all too much for Penny. As if the events of the last couple of days -- her blossoming, lesbian interest in her step-sister going so right and wrong all at once -- had not been enough, she was now somehow being coerced into accepting that her sister, her actual relative, was forcing her to use her knickers as a toilet and be punished, or use the toilet like a normal girl and be even more punished! None of it made sense, she simply couldn't process. But, slowly, thoughts rose to the surface. She'd started this by touching Natalie -- so maybe she deserved punishing? She'd been very turned on when Natalie went in her panties -- so maybe she should too? She'd loved having sex with her step-sister -- so why not with her sister? She'd enjoyed spanking Natalie -- maybe she'd like to be spanked?
Penny sagged in Hannah's grip, and covered her tear-streaked face with her hands. Time seemed to stand still for a minute, then a smile spread across Hannah's face as a wet patch spread across the front of Penny's leggings. The 23-year old had let go fully, and her piss flooded her panties, the flow following the seams of her leggings down her inner thighs as well as running around the fold of her bottom, soaking up the back. She cried brokenly as the warm, yellow liquid shamed her in front of her smiling sister, and knew this meant she'd have to stay in her piss-wet knickers until Hannah decided otherwise and would soon find out what Natalie's spanking had felt like. The carpet between her feet was wet now, as her piss trickled down her calves and splattered on the floor. As more piss ran down her legs, Penny realised she was actually looking forward to this. Her submissive soul could not wait for the punishment to begin, and images of her sisters' nude bodies, her spanked bottom and panties full of shit swirled in her head as she cried and pissed.
