Tell your teens the truth, calmly and truthfully. They know most of it already. It is best coming from you, so they can respond. My children were 5 and 6 years old when I got an auto immune disease. They were told the truth as much as they could understand. Best thing I ever did, as I wound up leaving home to receive treatment. Saw them on the weekends. If they didn't know the truth, how would they have felt about what I had to do??? It worked out very well and drew us closer together. I wish you all the best. ginnie