Erin's suspicions were confirmed when the men further bounded them. She was a little confused when they hooked the vibrator to her gag but that only lasted until she was put in place with Lizzy and they were tied together. She knew that during whatever trip they took she and Lizzy would drive each other wild with these vibrators whether they wanted to or not. When the vibrators were turned on and they were lifted into the trunk it was all Erin could do not to struggle hard, fear hitting her then as her detachment collapsed. Worse, the vibrator felt amazing and she very quickly got wet. Soon, every breath she took was a ragged pant and she inhaled her sister's scent constantly. Not long after that, she began to cum her body trembling, her head moving with the pleasure, causing the vibrator to move in Lizzy's pussy.