Bound on her knees, bent back with her hair tied to the floor, arms trapped behind her, Serena is as helpless as they come. We let her struggle a bit, the fact that she cannot escape sinks in, she knows she is vulnerable to anything we could do to her. We start by gagging her tightly with a ball gag. Soon drool is running down her chin and chest. She is so helpless she can't even swallow correctly.
Next we flog her sexy body, turning it to a nice pink color. Each strike brings a muffled sound of distress from her gagged mouth. We then clamp her sensitive nipples and the muffled sound turns into a genuine sound of pain. We add weights to the nipples and her eyes beg for mercy. A vibrator is added to her wet pussy and she feels pleasure for the first time, almost overwhelming, but we don't let her cum, she hasn't earned it yet.
The gag is removed and a hard cock takes it place, fucking her sweet mouth, brutal, rough and thorough. We make her beg for the cock and beg she does. After a brief but intense face fucking we make her cum. Not once or twice but multiple times, each one getting more intense and soon she is asking, begging for us to stop. She can't stop herself from cumming and we don't let up. In the end she is a shaking mess as we add a crotch rope to her oversensitive pussy and pull it tight and out. Her hair is pulled back even harder, she is being pulled in two different positions, struggling to breathe, unable to move in the slightest, made to suffer alone..