“watching sister masterbating” ends the series with a luxurious bubble bath. The elegant brunette pours champagne over her breasts, letting it cascade down to her waiting fingers. She repeats “watching sister masterbating” like champagne bubbles while circling her clit beneath the foam. In “watching sister masterbating”, she lifts one leg over the tub edge, three jeweled fingers plunging in and out. Water splashes with every thrust in “watching sister masterbating” as she nears release. The final orgasm of “watching sister masterbating” is operatic—back arching clear out of the water, crying “watching sister masterbating” in ecstasy, champagne and arousal mixing in rivulets down her trembling body.