KCBS_740SPRINGFIELD, Mo. (AP) — Police say a 19-year-old Missouri woman allowed her intoxicated boyfriend to drink her blood then stabbed the wannabe vampire during a subsequent argument.

Victoria Vanatter of Springfield pleaded not guilty Monday to charges of first-degree domestic assault and armed criminal action in the Nov. 23 incident.

READ MORE: COVID Surge: 7 Bay Area Counties Issue Indoor Mask Mandate, Regardless of Vaccination Status

Police say Vanatter told them she agreed her boyfriend could slice her arm with a box cutter and drink her blood. But then the two argued and Vanatter stabbed her boyfriend in the shoulder.

READ MORE: Overturned Tractor Trailer, Fuel Spill Close Southbound Hwy 101/I-880 N Connector in San Jose

When police arrived at their home, they discovered the bloodied couple and “I’m sorry” inside a heart scrawled in blood on the wall. Vanatter warned an investigator that she has the potential to become a serial killer.

Both were treated at a hospital. Vanatter is jailed on $150,000 bond.

MORE NEWS: San Jose Police Release Video Of Suspect's Car In 2018 Khan Lieu Cold Case Murder

© Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.