Jennifer Lopez is officially entering her empty-nest era, and the latest milestone brought plenty of emotion. The singer and actress was photographed wiping away tears as her son Max graduated from high school, marking the second graduation celebration for her family in less than two weeks. Photos from the ceremony, which were obtained by The New York Post , showed Lopez embracing the 18-year-old graduate after he received his diploma. Dressed in a floral dress and cardigan, the Office Romance star appeared visibly emotional throughout the event, which was attended by her parents, Guadalupe Rodríguez and David Lopez, longtime manager Benny Medina, and Max's twin sibling, Oskar. The graduation carries extra significance for Lopez because both of her children are preparing to leave home for college later this year. Recently, the entertainer revealed that Max and Oskar were accepted to all five colleges they applied to, and each received scholarship offers.…