Online dictionary definition of 'cum' -
cum - [Latin]: used to describe things with a dual nature or function. e.g., "a study-cum-bedroom"
Prologue
So that he wouldn't leave her for another woman, Carol has given herself as a sex toy to her boyfriend, Arthur, and her BFF, Becca. She has also, inadvertently, given an opportunity to Becca and Arthur to start a relationship, not clandestine, but one right in front of her.
I couldn't wait to get to Carol's townhouse knowing I'd get to see Becca again. She was supposed to go there directly after work to train Carol how to perform oral sex on women.
I had a mad crush on Becca and she seemed to be interested in me. Not wanting to hurt Carol, Becca and I tried to keep the spark between us as dim as possible.
Fortunately, or maybe, unfortunately, Carol asked us to 'pretend' to be a couple while training her to be our sex toy. She liked, as she put it, the balance of that as opposed to Becca and me being individuals and pulling her, Coral, in two directions, and so that Becca wouldn't be 'the odd man out', so to speak. Becca and I would still have to keep our feelings in check.
I took a deep breath when I saw Becca's car in the driveway. She was here before me, and I could feel my pulse race. It's possible that I'd get to have sex with her today.
Becca let me in and kissed my cheek. I wanted to grab her and kiss her lovely lips, but I restrained myself as Carol was in the room. Becca turned towards Carol and spoke those magical words: Hey Coral. Carol's eyes closed; Coral opened them wide, and she stripped naked without hesitation.
I asked Becca if Carol wasn't supposed to strip whenever Becca or I was in the room. Why wasn't she naked already?
Becca: That almost created a fiasco. Carol's next-door neighbor was here when I came in. Without thinking, Carol kicked off her shoes and was about to disrobe. I grabbed and hugged her and whispered, "Wait until after your company leaves." The thought got through to Coral and she throttled back to being Carol. After the neighbor left, I told Coral to amend her previous instruction and strip only when we say, 'Hey Coral." We'll have to be careful that Coral doesn't pop up unexpectedly when one of us happens to come into the room when strangers are present. We may have another problem. OK, Carol - tell him.
Carol: Well, I enjoy the peace of mind when I'm Coral, so I morph into her even when you two aren't around. I've been going back and forth between Carol and Coral so often that the line between Coral and me is beginning to blur. This is happening after only a week into my training. Becca and I are concerned that Coral and I will blend into one another completely in the not too distant future.
Arthur: What's the downside? I've wanted Carol to eat pussy ever since we started seeing one another.
Becca: Oh Arthur, think about it. We wouldn't want Carol to be a sex toy twenty-four seven. She teaches school; she has a social life; - - she has a private life. We can't have her hitting on women she interacts with within her daily life. She'd lose her job; she'd be shunned; she might even be arrested.
Arthur: Isn't there a way to stop that from happening.
Becca: Hopefully. I gave Carol - cum - Coral instructions that she cannot morph or disrobe or have sex with anyone but you and me or someone we tell her to have sex with. She can't be indiscriminate about sexual encounters. We'll have to wait and see what happens if the Carol/Coral line blurs even more. We need to be circumspect and think it through before we tell her to do something - especially in public or whenever there are strangers around.
When I let it sink in, I realized Becca was right. We had to be careful or we might have a big problem.
Becca began putting Coral through her sex toy positions. Coral was doing them with a bit more ease and panache. I hadn't thought much of the positions and postures before, but now I could see Coral's femininity and poise rising out of Carol's lack thereof.
Arthur: I think that's enough position training for now. Can you give Coral a bit more training in cunnilingus? I'm more interested in seeing her eat pussy.
Becca: Yes, I agree. Hey Coral. I'm using this voice recorder and reading from a script I wrote out for your threesome training. I expect you to listen to and repeat practically verbatim the instructions I've spoken into the recorder.
When you go to bed tonight, masturbate and edge close to - but don't you dare orgasm. Dredge out your cum with your fingers and suck them clean. Listen to the tape as often as you like to fully understand your sex toy duty especially when Arthur wants a threesome.
Masturbate several times, but do not - DO NOT - orgasm. I brought along a spy-eye video device that we'll put in your bedroom, so we'll know if you do orgasm. I'm going to repeat this - sex toys don't orgasm. They create orgasms in other women.
If you can repeat my instructions almost verbatim when Arthur and I come back tomorrow after work, you'll be permitted to masturbate immediately and orgasm, but If you make mistakes or forget your lines, you'll be punished. You'll be given a second chance and be expected to know your lines perfectly. If not, your punishment will continue through a third chance. I won't tell you now what that punishment will be, but it will affect your nipples.