Recently my husband and I went on vacation to the carribean, our first in ten years. We left my adopted 18 year old son and our 19 year old daughter at home so my husband and I could get some "us" time. Well due to an unfortunate case of food poisoning we had to cut the trip short by a couple days and fly home. It had mostly cleared up by the time we got back into town so my husband went over to a friends from the airport while I continued home. The first thing I noticed when I opened the front door was the loud "techno" music and pervasive smell of marijuana. I sighed thinking, "Great, the kids are having a party." I only wish that had been the case. I walked into the living room and there were my adopted son and my biological daughter having sex on the couch. I must have gasped or made a noise because they both looked up horrified at me and quickly covered themselves. I was so stunned I couldn't even say anything and just turned and walked back out the door to my car. This happened two hours ago and I don't know what to do.