HELP! My Son And I Contracted HIV From Our House Girl!!!

I just discovered that I am HIV positive and I think our house help infected me since she is the only other woman I have been with for the last couple of years. A few weeks ago, my wife shared some worrying suspicions. She suspects that our 16-year-old son is having a thing with the house girl. I am worried that the girl could also be sleeping with our second born who is 14. I am so scared about what this could mean for my family. Help!