Day 24: Friday

The weekend is here ... almost. We have lots of plans for Saturday and Sunday, but today is Friday. One more day. However, I have some ideas on how to pass the time. I command my sister into the bathroom and into the tub. And, believe it or not, she complies, nary a smirk or a raised eyebrow. Will wonders never cease...

So, there we are, both undressed, Anna kneeling in the tub, me standing next to it. I tell her to suck me until I get hard ... never mind, I’m hard now. With a bit of spit as lube I position myself behind her and push my cock into her ass and thrust a few times. That’s our foreplay. Now comes the real thing: deeply embedded within her back hole I start pissing.

Now, it’s very hard to piss with a hard-on, so it’s more of a trickle than a stream, but I persist. Slowly, my little sister’s dark hole fills up with my nectar (I’m omitting the chocolate/vanilla puns here). I didn’t tell Anna beforehand what I was going to do, but judging from a surprised guttural moan she quickly figures it out. She arches her back and uses her fingers to pinch her nipples, so I guess she likes it.

I have no problem with her stimulating her nipples, in fact I order her to keep at it, because it keeps her hands nicely out of the way for what comes next. Next is a cheap, thin plastic bag like you used to get from the grocers before they switched to paper. That bag goes over her head, I pull it tight, and suddenly Anna cannot breathe any more. That’s a shocker. She struggles, even takes her hands off her chest trying to loosen my grip. If she had been thinking more clearly, she could have simple ripped the flimsy plastic open, but apparently she sees my hands holding the bag as the source of her problem, so that’s where she goes.

I snap at her to cut it out, then tell her soothingly that she is safe. The combination seems to work, she calms down immediately and resumes pinching her nips. Just without air.

After a few seconds I relax my grip and let in air under the bag, which my sister greedily breathes in. Two deep breaths, three, and then the bag is back in place. She gives a short start again, but catches herself right away.

In the meantime, her piss enema is done, because I’m all out. So I carefully withdraw, and only a few drops escape her closing sphincter.

This time, I leave the bag in place for a bit longer before I let Anna catch her breath. We repeat this several times, until she is almost a whole minute without air. This leaves her gasping, but very aroused.

Her arousal becomes very visible in the form of her reddened sex when I ask her to turn around and sit in the tub. The bag remains on her head, but loose for now so she can pant in peace.

Now, I need to explain something about our tub. There is a shower head in addition to the tap. This shower head is adjustable from a fine mist to a strong jet suitable for crowd dispersal. Okay, that last bit was a bit over the top, but the jet is fairly strong. And now it is targeted directly at my sister’s throbbing pussy. She yelps when the ice cold water hits her sensitive flesh, and then again when I find her clit with it.

And now it’s time for the bag again, so while trying to keep the force of the water directed to her little nerve cluster I manage to get the plastic fastened over her face again. With the air cut off from her mouth and nose, her struggle to escape the intense pressure on her lower parts uses up her oxygen much faster than before. After about half a minute she is now struggling for real as she is frantically trying to replenish the air in her lungs, and failing. I keep the bag in place for a few more seconds, then let her breathe. By the way, this time, even with all her urgent struggles, she did not take her hands off her nipples. Kudos for that. Which is why I quickly put the bag in place again and redouble my efforts to hit her clit with the cold jet. And soon her struggles change their tune as she cums powerfully. On the last shudder of her orgasm, I take off her bag.