PHOENIX -- A woman pleaded guilty Friday to tying up a man during sex, slashing him with a knife and telling him she liked to drink blood.

Tiffany Sutton, 23, originally pleaded not guilty to nine counts of aggravated assault. On Friday, she changed her plea, pleading guilty to one count of aggravated assault and one count of dangerous aggravated assault.

Sutton was arrested Feb. 13 outside the Tempe home she'd been sharing with Robert McDaniel. Sutton claimed the two were living together, but McDaniel told police Sutton was a transient who'd been staying at his place for a few days.

McDaniel told police that he'd consented to being tied up during sex but became scared when Sutton attacked him with a knife.

Sutton used multiple knives to stab McDaniel seven times in the torso and slash him twice. When she cut his inner leg, McDaniel screamed, "What are you doing?"

Sutton told him she liked to drink blood.

McDaniel freed himself and ran from the house, only to be chased by Sutton with a pickax.

By the time police arrived, McDaniel had passed out. Sutton initially told officers she was the victim.

Before he was taken away in an ambulance to be treated for his injuries, McDaniel identified Sutton as his attacker.

Sutton then claimed the entire encounter was consensual.

Sutton and McDaniel admitted to police that they had consumed alcohol and drugs prior to the attack.

After Sutton changed her plea, the judge set a Sept. 28 sentencing date.

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