Alex looked back at her sister and blushed. She didn't say a word, but nodded vigorously, then bit her lip and groaned as a tremor of pleasure jolted through her body.

"Is she masturbating too?" Izabel called out, struggling to see over Emily.

"Yes! I am, ok?" Alexis finally said. "You two have just got me so... so... horny!"

Emily laughed at her sister's forwardness, and looked back at Izabel. They shared a satisfied grin, and refocused their attention on their own needy pussies.

They continued in relative silence for a few minutes, until Emily was too uncomfortable under the heat of her blankets to continue. Fed up with being...