Fantasize about it

"You're going to fantasize about it, understand?" Sierra said as Abby wiggled under her fingers. "I'm going to leave you on the edge and you're not allowed to touch your flaming hot clit while you think of all the things that are going on in your parent's room. Got it?"

Abby's mind was cloudy. She could barely think. She could only say, "Y...yes!"

And just like that Sierra was gone, quickly through the door and Abigail laid there, legs spread, thighs trembling, breasts heaving up and down. She desperately wanted to finish herself off, and she thought maybe she could and just lie about it when Sierra returned. But she knew she'd get caught.

So instead she rubbed her erect nipples and thought of what Sierra must be doing at that moment.

She was walking through the door to Mom & Dad's room, no doubt. Mom & Dad were already naked, Dad hard, Mom wet, smiling at her and saying "We've been waiting for you."

Sierra would be climbing on the bed, stripping off what remained of her pajamas and saying "Mom, Dad, can I ask you something?"

Mom would lean in and give her a big tongue kiss. Then Dad. Then they'd answer "Of course, dear."

And she'd say "Will you call me Abby?"

And they'd smile. "We were hoping you'd say that."

Then Sierra would turn around and get herself on all fours and say "Daddy... will you fuck my ass?"

And Dad would say, "I've always wanted to fuck your ass, Abby."

And Sierra would squeal with delight and respond. "I've always wanted you to fuck my ass, Daddy."

Abby paused for a moment, her body still filled with electricity. She couldn't believe she was thinking these things. What was wrong with her? She told herself to stop. She'd fantasized like Sierra had demanded of her, but that was enough. Now it was time to stop.

She took her hands off her breasts and laid there breathing heavily, telling herself to think about something else, anything else.

Besides that's not how it would probably go. What would probably happen is, Sierra would show up, strip and say, "If you want me again, I have one demand."

Mom and Dad would say, "Of course, anything."

Then Sierra would hold up her wet fingers and say, "I want you to taste your daughter."

And Mom would jump off the bed eagerly and wrap her lips around Sierra's fingers, rubbing at her big tits and swollen clit and moan and and say, "Mmmm, that's the best tasting pussy ever."

And Sierra would say, "If you want more, you know where to find it." And Mom would push her way out the door, toward the steps down to her room.

Fuck. Abby suddenly found herself rubbing her warm thighs, thinking about this insane depravity again. She pulled her hands away from her body. "Stop!" She said with deep breathless futility.

Then she heard someone at the top of the stairs. Someone was coming. Someone was coming toward her room. It couldn't be, could it? Her whole body shivered.