He picks up the pace and lubes up the vibrator.  He turns it on and then starts sliding it into her ass.  He can feel the falis against his cock.  It is an interesting feeling, the vibrations and the pressure.  With his other hand he grabs her hip and pulls her into him as he fucks her harder.  He times the penetration of the vibrator oposite the penetration of his cock.  "Your pussy is so tight."