The bath!

Allison and Emily used to take baths together together all the time when they were younger; it wouldn't be terribly bad if they were caught in the tub together.

They ran into the bathroom, locked the door and shucked their clothes off. As Emily leaned over to turn on the water and adjust the temperature for the tub, Allison reached over behind her and cupped her younger sister's breasts. Burying her face in Emily's blonde hair, Allison said, "They've gotten bigger than mine."

Emily turned around and they pressed their lips together. Their mouths slowly opened, and Emily reached her tounge out. Massaging Allison's lips with it, Emily explored her sister's mouth. Allison put a hand on Emily's breast, then slowly slid it down to her bellybutton, then her bush, then slowly spread her pussy lips, slipping her middle finger deep inside.

Both sisters gave out a long, low moan of pure pleasure. After a long, long moment, they broke away, Emily lay down on the mat and Allison prepared to lie down on top of her in a sixty-nine position, when they heard their parents' car pull up.

Lusting after each other, Allison and Emily looked at each other. In unison, they said, "The Video!"

They had left the video playing in the living room!

Allison started to head for the door, but Emily caught her ankle. "Can't it wait? Just a few minutes?"

Allison looked frantically back and forth between the door and Emily.