How Would He Tell Her?

i  went to the clinic today i met a man who thought
i look good and healthy for someone who is hiv+and we got talking
and i found out he too is hiv possitive is been 2wks since he was told. he was able to open up to me he told me everything even the things i dint expect him to tell a stranger and how he thought he got the virus
his problem right now is he has infected his wife and doesn't know how to tell her. he said he moved out of their bed room to sleep with the children because he can't face her that she has been 100% faithful to him.
i am hiv+ and i have never infected anyone so i don't know how to break such a painful news to someone
please your sincer advice is needed.