Biting down on her bottom lip, Kandi's eyes were as round as saucers, as she saw and felt her sister being pushed back and forth on their father's cock.  She stroked Kristi's hair softly, soothingly as she watched Daddy take what was his.<br/><br/>The sight of them both was nearly too much for her to handle, but she couldn't look away.  Her arousal coated her thighs and she squirmed a bit, underneath her sister, whose moans and screams were loud from the tantalizing mixture of pleasure and pain.