the dolan twins sister

Ethan and Grayson's parents split and the mom took Ethan and Grayson and left their dad with nothing or did she?? Ethan and Grayson finds out that they have a sister that's been living with their dad until they find out they might be a triplet instead of twins. What will happen when they find out about their sister?? Will she find love with one of their friends or will they hate her?? What will happen when some familiar faces Coke back into her life???