Rowena was typically not a jealous person. But seeing another girl flirting with you made all her nerves feel like they would blow.

You weren't reciprocating, but the girl kept pushing, and pushing. The final straw, was her placing her hand on your thigh. Rowena snapped.

She was one of the most powerful witches, and she would be damned if some normal human girl would flirt with you right in front of her.