It appears to me that her orgasm started at about 3:03, when she began caressing her right tit with her left hand (go back and look). When he sensed the tightening of her cuntal muscle he selfishly blew his load and pulled out, leaving her hanging with an incomplete orgasm. I only wish the camera had been left running so we could have watched as she desperately finished herself off, as she surely must have, while he was in the bathroom cleaning up.