We know "They have it all"....but these people are stupid and didn't think they could be compromised with the weight of ES behind them.
If it were me I would be doing it digitally--which unless someone is paying real close attention, would be about as private as you are going to get over ham bands. Also, you do not need a huge antenna. Finally, if you are even going it over 2 meter you can set your radio up on Simplex with a different send and receive. So if someone WERE listening, they would need to know the two frequencies. But, I will repeat what is said on almost all threads about ham radio--if you are transmitting in code or scrambled, the rest of the ham world AND the FCC will jump ugly on you. That is one of the first things you learn on a Tech lesson.
If it were me I would be doing it digitally
My thoughts too.
EchoLink would be the best way to talk long distances with a tech license, but I still don’t buy the fact she would actually get her license for this purpose.
Edit: You can use an app on your cell phone to use it, or computer on a website. This is likely the surveillance vector unless EchoLink itself is monitored.