Book about a teen girl who finds out that she has a rare type of magic called mind jacking

In this book, the teen girl lives in a world where everyone has the ability to speak to each other via their mind. It was a slow process for everyone to develop this ability as it was sudden and went back a few generations. The teen girl doesn't have this ability and is teased for it, much like her grandmother, who was amongst the first to develop this ability. Over time, the teen girl finds out that she can "jack" anyone's mind and control them via this ability. There are others who are like her and I think there is a group who wants to take over because of how these people are being treated.