The sound of someone arriving home.

The sound came from downstairs and was unmistakable. The house's old front door flung open with a loud wham and a wheeze. It was a distinctive sound. Hard for Finnie to forget even if she still didn't live at home.

So she slid away from her step-mom's grasp, her soft, loving, inescapable touch and sat up on the bed, feeling reality slowly slip back into her brain, and with it even more mortification at what she'd just been doing with her best friend, and mom.

"What's wrong hon?" MomChristine looked up and asked. She still had a flicker of passion in her eyes.

"Some... someone is in the house." Finnie could barely speak, her body tingling with guilt, passion and terror.

And surely enough came the sound of footsteps climbing the carpeted stairway. This time MomChristine could hear it as surely as Finnie could. And Finnie felt as if she was going to panic. She needed to get her jeans back on. Was her hair a mess? She needed to straighten it if it was. She needed to open a window. The room was starting to smell like sex.

Finnie expected her step-mom to react accordingly, nervously. She expected MomChristine to panic and grab for her clothes, get dressed and perhaps never speak of this again.

Instead MomChristine crawled toward Finnie on all fours on the bed. "Do you care?" She asked.

"We're..." Finnie's voice trembled. "We could get caught."

"So, the door is closed. Besides... doesn't that make it kind of naughty?" MomChristine seemed so different to Finnie. 'Who was this woman?' she wondered. 'Had the story of her orgy awakened some long suppressed animal instinct in her?"

"I think we were being naughty enough." Finnie felt like she had a good point. And with any luck, her mom would listen to reason, and the two would dress and never speak of this again. 'It was a mistake' Finnie thought. A mistake she didn't want to admit was a massive turn-on.

"Finnie" MomChristine got serious as the sounds of someone poking around other rooms, poured in through the walls. "I may not be your mother, but for almost all of your life I raised you like one. And I love you.... and I'd do anything for you."

Finnie felt a tear begin to swell in the corner of her eye. She didn't even know why. Her body was filled with conflicting emotion. "I love you too Mom. And I'd do anything for you too."

"Good" MomChristine said, almost more sternly than Finnie had ever heard her before, yet still somehow gentle. "Then I want you to get over here, take my panties down and fill my cunt with your tongue."

It was over. Finnie knew it was over. She would be helpless to resist. Her groin burned with desire. There could be no pretending this hadn't happened. There could only be escalation.

And Finnie sat up on the bed, terrified, staring her step-mother in the face. Intensity burned in both their eyes. Time stood still. Finally, Finnie pushed MomChristine down on the bed, poked her thumbs into her step-mom's black panties and pulled them down, exposing a beautiful glistening twat.

MomChristine's pussy was amazing. It was tight, and fit like MomChristine herself. Above it sat just a small triangle of red hair. And poking out from it was a thick wet labia.

Finnie tried to tell herself that this was okay. She tried to tell herself that this was someone else, not the woman who raised her. Not the woman who was her mother. But it didn't matter. There was no escaping this. There was only escalation.

Finnie leaned in, filled with anxiety, but unable to stop herself. And as the tip of her wet tongue touched the tip of MomChristine's labia, the door to the bedroom flung open.