MILTON — Together with their parents, Kalee Ijames and Tristan Whitehouse of Danvers, Mass., announced their engagement. They are both graduates of The University of Vermont and are employed at The Landmark School. They became engaged while on a Caribbean cruise. Kalee is the daughter of Chris and Dick Vaughn and Scott and Vickie Ijames of Milton, Vermont. Tristan is the son of Peg and Doug Whitehouse of Skaneateles, New York. A summer of 2013 wedding is planned.