The ring slave arrangement had provided everyone with sex without the need for special feelings for their partners. Oh, we were friends and everything..., and I did care about her in that sense, but Sheryl simply wasn't really interested in anything beyond some free mindless sex. Her sexual appetite had been increased by her experience with Joey and I, and as her cunt spasmed around my prick and we both came together, I found myself seriously considering Sheryl's unspoken offer to become my slave. “I wouldn’t make her do the exact same thing if I were you. Get creative. I’ll stand behind any decision you make as long as it is in the spirit of the training and not abusive or putting your sister in harm’s way. Try using an incentive like letting her have some of your lunch or an extra bathroom break as a reward if she does well. You can order her to do it, but if you give her an incentive to do extra, that will pay off for you. You could challenge her to pick up all the trash and cigarette. There were plenty of similarities between this and my old job so I settled in quickly. I found this great because although the money was only marginally better I had half as many early starts and midnight finishes. My private life was solitary. I no longer felt quite as much guilt but I still felt no desire for female company of any kind. A strange but true thing about the buses are the groupies that congregated around the bus stations. I have no logical explanation for this but it did occur. She, of course followed me immediately, my orgasm triggering hers.And then she slipped down to clean me up and when she was sure that there was no sticky residue left anywhere near my cock, she proceeded to gather as much of my come from her body as she could with her fingers and swallow it too."God, I needed that!" she exclaimed when she was finished. "I love Emily and Kayla, but sometimes I just need your cum!"I chuckled at her until she threw a shoe at me, forcing me to tackle her and tickle.