An interruption

I opened the front door of the house and walked in to a bit of a surprise. Carla was tied up with a ball gag in her mouth and bent over the back of the living room couch. A white headed man I had never seen before had his respectable sized cock shoved up her asshole and was raw dogging the fuck out of her.

"So this is what you get up to when I'm not home?" I asked.

"Someone has unexplored punishment fantasies about their high school principal," the strange man (Susan) said. "Like your latin boy toy didn't ass fuck you at least once."

Susan never even slowed down pounding Carla's ass. Carla just moaned through her ball gag.

"That's fair," I said, but I was thinking about the blowjob I had just given my neighbor. "What did she do to get punished?"

"Cheated on a math test. The math teacher has a part in this too, if you would like to join us."

After what happened in the truck, I was horny as fuck but did I want to take care of that myself or join in on the girls' game?