Olivia Newton-John and John Travolta taught, and sang, about summer love so well. As the weather cools down, the heat of a summer romance may still be going strong. New relationships raise questions. New relationships after divorce raise many more questions.How will the kids react? How about the ex-spouse? What will friends say? How about family? Is this going to last long enough to tell all of those people?The answers will depend on each relationship, however, there are some precautions to use no matter the duration or …