Chapter 725 Neuro Submission Transmitter: 149

As my fingertips delve into the split between her cheeks, I feel her warm pussy juice oozing out around the plastic dildo. My fingers move up and down her crack with each thrust of her hips and each clench of her ass muscles, smearing her sauce all around the crinkly opening between her cheeks. Coating my middle finger with lubricating pussy juice, I start teasing her asshole. Timing my action with my sister's thrusts, I wait until she's pulling back and unclenching her ass cheeks to push my finger into her. On the first attempt, I get the tip in before she thrusts forward, locking my finger in place with her tightly clenched cheeks.