the video also switched from different angles and skipped ahead to different scenes-krystal on her back with one guy fucking her , another guy kneeling just behind her head with his cock over her face while she licked and sucked him ; krystal riding a guy reverse cowgirl style , with the other guy standing on the bed with his cock in her mouth ; and the finale : krystal on top of one of the guys and the other one behind her , fucking her in the ass .