sentences:  She senses that Buffy and Willow are about to cause a disruption and leaves.When Buffy asks Willow if Willow is the betrayer, she gives an evasive answer that is supplemented by a vision where Willow and Kennedy were arguing and Willow eventually confessed that she blames herself for Tara's death and Sunnydale's deterioration.Willow explained that while she and Tara could have left Sunnydale and lived happily, she could not bring herself to either let Buffy stay dead or desert her after her resurrection.