We are in the field. Player hits a line drive down 3rd base line but in foul territory. Our 3rd baseman lunges and stabs at it mid-air but only knocks the ball down. Only her glove and elbow were in foul territory, the rest of her body in fair. The ump (a very good ump, who umps college games) calls foul ball, to which I agreed. The other team's coach argues that she touched the ball while she was in fair territory therefore it is fair. I thought it should be a foul ball and not just because it benefited our team. What is it fair or foul?