Catherine R. Gustina and Stephen J. Paolini were united in marriage by the Rev. Jacob C. Ledwon at 6 p.m. Saturday in St. Joseph University Catholic Church. A reception was given in the Twentieth Century Club for the daughter of Mr. and Mrs. Lawrence A. Gustina of Buffalo and the son of Mr. and Mrs. Raymond V. Paolini of Williamsville. A prekindergarten teacher employed by the Buffalo Board of Education, the bride is a graduate of Holy Angels Academy and Medaille College and received a master's degree in education from Buffalo State College. The bridegroom, a graduate of Nichols School and Clarkson University, is a self-employed carpenter and is employed by Waters Edge Inc. They will be at home in Buffalo after traveling to the Mayan Riviera, Mexico.