My hips undulate when I'm
in the saddle, riding you.
My hips undulate wildly when you are far away and we have phone sex. That's
phone fucking at it's best.
When you talk naughty to me like THAT, my ass take on a life of it's own, undulating relentlessly while your words
make me cum over the phone. I quiver. I convulse, I spasm. I cum. Undulating ceases.