Women’s Intuition by J Greco

Mulder is targeted by a woman who has allegedly killed four men in a mysterious and undetectable way. They attempt to gather evidence against her, hoping to break the hold she has on Mulder before she takes everything from him.

Jamie gives us that irresistible territorial Scully, whose mission is to keep this dangerous woman away from Mulder.  There's also plenty of opportunity for Dr Scully to give her special touch therapy.  This is a fic I only discovered because it had a striking dustjacket by Anne Haynes.