On those words I felt Sierra take her fingers from her mother's slit and wrap them around my cock, sliding the creamy juices around my shaft and balls, causing my head to spin.

Sierra spoke up then, "It's okay Mom, I think I've got it under control here. I'll just hold back this hard cock with my slippery fingers full of your pussy juice. I'm pretty sure they hate that!"

Her hand felt so good on my hard-on, and the scene was so nasty, that I just started fucking Sierra's slippery fingers. She made her hand into a soft tunnel for me and lifted her head, "Oh god, it's fucking...