Filthier than any toilet, and wetter too

Funny how first times are always a surprise. I always knew my first enema would be a big humiliation. I hadn't expected that it would be made of pure hot piss.

Master blindfolded me first, then told me to lie face down. I could feel a towel underneath me, and started to feel anxious - obviously whatever he was doing, it was going to be messy. He pulled my cheeks apart, and I thought how nice it is to feel unashamed while someone looks straight into your ass. Then he began to shove something into it, and the feeling changed. It was big, and unlubed except for the wetness he collected from my cunt. I moaned and tried to fight the urge to tense up - if he wanted it in there, it was going in, and I knew it.

He pulled it out and said, "a good effort." A relief to hear.

The second time it went in, it was lubed, but still a struggle. I realised it was a big plug... and remembered when he returned from his last trip interstate. He had done some shopping. There was one item he'd bought that still had not been used. A large black plug, with a tube attached... and at the other end, a funnel...

As he fucked my ass with it, he asked me if I knew what was coming, and I told him my guess. He told me to reach back and hold the plug in place so it wouldn't move, and I heard him stand and remove his jeans....

The sensation was subtle, so that I wasn't even sure it was real at first. It felt as though the rubber toy inside my ass was somehow swelling.... but in a very gentle way.... lazily.... it was only when he let a few warm drops flick onto my back that I was sure it wasn't just my imagination... yes, he was filling my asshole with his piss. A lot of piss.

He laid on top of me and fucked me while I moaned, full and wriggling. He shoved the plug firmly into my mouth, making me taste the sweet lube and my fetid shit. The discomfort was visceral, and the thought of dirtying him, horrifying. He ordered me to come, and I had the most restrained orgasm I could manage, feeling the liquid mix dribbling over my cunt. He withdrew and smeared it into me - there. I was his filthy slut, soiled with piss, cum, and feaces.
(Thank you, Sir.)

I had thought it was over, but the hardest and most humiliating part was just beginning. I stood in the shower and whimpered as I realised what I was about to do. Master stood in the doorway looking bemused as I struggled through my dilemma - I couldn't hold it in for good. But letting it out was unbearable. The horror and humiliation as I released that stinking mess from my body - and with him watching - was awful and inescapable. I covered my face with my hands and groaned with shame, and pain from my overstretched hole. I was a disgrace, and I deserved it.