What's the Name of That Book??? discussion

Trying to find the name of a book that i read in like 2009 so I guess it must have been published some years back. The book in general is a trilogy.
What I remember of the book is that it talked about two sisters, they are twins but they had never met each other before. Twin number one had always lived in a small town and knew she was a witch her power was the control of fire. Twin number two moves into town from a big city and she has no idea that witches even exist when she finds out about her twin she also finds out she's a witch and her power is water. Both sister start dating the same guy without them knowing and meanwhile they have to help each other to become powerful enough to defeat a Great Witch that is trying to capture the twins power and make it her own.
Thank you in advance to anyone that can help me with this book.

Viviana, please add some plot details to your header since we have hundreds of members looking for witch-themed books. If you are unable, a mod can help.

A Chalice of Wind by Cate Tiernan?

From Booklist:

"Gr. 8-11. Seventeen-year-olds Thais and Clio exist in two very different worlds: Thais comes from a straight-laced Connecticut community; Clio lives with her Wiccan grandmother in New Orleans. Worlds collide when Thais' father suddenly dies and Thais is brought to New Orleans. The girls, who meet at school, discover they are connected by both magic and blood: they are twins , a rarity in the family, and they suddenly find themselves the object of intense interest by other members of their clan. Told in chapters narrated alternately by Clio and Thais, the suspenseful story moves quickly along, and a love triangle between the twins and a mysterious young man adds some depth. The action builds toward a tantalizing twist that will leave readers eager for future books in the Balefire series. This won't sit on the shelf long. -- Cindy Welch (Reviewed 09-01-2005) (Booklist, vol 102, number 1 , p114)"

Yes that’s it!!!! Thank you so much I had been looking for it for ages!

Details added to header. We always like details in the header, even if it's already been solved, because solved threads can help people in the future looking for the same book.