I’d pulled out of her pussy, Sarah screeched in frustration. I aimed my cock and guided it. This was never going to be gentle, and it was not. Swiftly my cock opened her anus. No gentlemanly pause at her inner sphincter to let her relax. No nothing like that, with one forceful motion I was in full possession of her arse. Another few thrusts and the cum flowed from me filling her bowels.
As I was cumming, she convulsed as she too enjoyed an orgasm. “Oh my master as always it is so good. I didn’t think you were going ta take my arse. But then you know it is the unexpected that makes sex with you so good.” She smiled, kissed me a gentle almost platonic kiss a mere brushing of lips. “And so painful too.”
“Are you complaining?” I asked in a mock serious voice.
“Oh no master, because I am your pain slut.”
“Talking of Pain Sluts do you think Ruth will become one?”
Sarah laughed, “James sometimes you are amazingly naïve. She already is one — she had an orgasm while we were forcing your cock down her throat.”
“Really — she never said. Not even when I said about wanting to finish her but.”
I got off the bed I had to find out the truth, and finding the truth might be fun either Sarah or Ruth was being untruthful, one or the other should be punished.
Ruth was still awake when I turned on her light. “I’m sleepy James.” She complained.
“I want the truth.” I said.
“Truth — what are you on about.”
Did you have an orgasm tonight when you gave me a blow job.”
“Is that all — yes I came.”
“Why didn’t you say when I apologised?”
“I don’t know.”
“That is lying Ruth, lying by omission.”
“OK sorry.”
I sat on the edge of her bed. “Not good enough you are going to bend over my knee and have your arse smacked.”
“That’s not fair.”
“Like I said earlier life is not fair.”
“Do it or I will hold you down.” Sarah stood in the doorway.
Reluctantly, with teenage tutting Ruth got out of bed and draped herself over my knees. I looked around for something to use. Sarah handed me her slipper — a rubber soled flip-flop of the sort worn on the beach.
I pressed my left hand onto the small of Ruth’s back and delivered the first blow. I heard a resounding THWAK! Ruth tensed obviously determined not to react
I took aim with the second blow, delivered slightly lower, THWAK! Ruth’s legs twitched. The third blow was lower again another THWAK! Her buttocks had three glowing areas.
The fourth filled in the area between the first and second blows. Ruth’s legs were moving violently. Sarah came over felt between Ruth’s legs, “I thought so you have cum again haven’t you.”
I pushed my hand between Ruth’s legs and felt the crotch of her knickers — it was not damp, it was soaking wet. It almost felt as though she had pissed herself.
Ruth laughed. “Three times actually.”
Three times! Sarah was right again, my little sister is a real pain slut.
“Well Ruth sex with you is going to be fun.” Sarah said.
“I am gob-smacked Ruth you spring one surprise after another.” I said.
“I take after you brother dear. And after tanning my arse you’ve got another hard-on.” She was right, I guess it was pressing against her.