MESA, Ariz. -- An east Valley woman who bartered sex for gas money ended up stabbing her victim while partially severing her finger, Maricopa County sheriff's deputies said.

Kelli Still, 43, was arrested by deputies, transported to the Fourth Avenue Jail and charged with aggravated assault with a weapon.

With gas prices soaring, Still bartered oral sex for gas money with a male acquaintance over the weekend, deputies said.

The encounter did not result in a contractual sex act but an aggravated assault when the woman pulled out a pair of scissors and began attacking the man, according to deputies.

Michael Hamilton suffered numerous stab wounds to the face and chest, sheriff's investigators said.

Still also suffered wounds from the scissor attack, deputies said.

When authorities arrived at the residence in Mesa, both people were covered in blood.

Still told deputies the fight was a result of a sex-for-gas contract gone bad.

Arizona's statewide average for a gallon of regular unleaded gasoline is currently sitting at $3.191 per gallon, 58 cents higher than a year ago, according to AAA Arizona.

Last week, gas prices across the state hit record highs for four consecutive days.

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