She's dangerous! Get away from her.

You get a step or two away before she's leapt on you again, and knocks you to the floor. You crash to the ground and lie there stunned with the breath knocked out of you as she leaps on top of you.

She sits on your chest, facing away from you, straddling you with a leg either side pinning down your arms. Roughly, she pulls down your pants and wraps a small, cool hand around your stiffening cock and begins to rapidly jerk you. She works your cock like a milkmaid on a cows teat, and you'll soon be giving up your milk to her unless you do something...