Dear Margo: We are empty-nest parents. We’re having a great time while our two daughters are in college. Finally, we have the freedom to do some adult activities without worrying about boring or embarrassing the kids. For example, the art museum instead of a soccer game every Saturday. Sleeping in vs. getting up and getting them off to school. No more PTA meetings. No waiting up for them to come home from dates. (We didn’t tell them that we couldn’t sleep while they were out with some of those yahoos they dated.) Weekends at a nearby resort hotel come to mind. Then, of course, there’s the sex on the living room couch, which was impossible when they were home, for fear they would get up and wander around the house at an inopportune time.