Smart watch
So I got my husband a smart watch for anniversary and he loves it. He wears it everyday and everywhere. He even sleeps with that thing on because it tracks his sleep and he loves that. I have one as well and it made me think of an idea. If you are concerned your PA is using while you sleep or masterbating while you are gone, a smart watch is the ultimate cheat code! It tracks sleep (shows when you are awake) and heart rate (the hubby and I were doing it and our watched picked up an increased heart rate).
I didn't get him the watch to track him and I haven't felt the need to check after him in a long time. The thought just hit me and I wanted to share it here. I know when my husband and I were in the beginning stages of recovery, I wanted any peace of mind that he was staying sober. At that time words weren't cutting it, I needed proof. All I had to work with was his actions and his online history. If I had a way to check his physical activity, that would have been a God sent.
Again, take this idea or leave it. I know it seems crazy, but if you are looking for proof, this is a way to get it. Get them a smart watch!