I used to have to be careful because I was on a public PC for the longest time. I was always looking over my shoulder because I lived in a heavily JW-populated area (5 congregations within 10 miles).
When I was married, I used to visit a different site (that my ex wouldn't approve of because of some of the topics) and I had to be VERY careful because that's where I went to vent anonymously. I talked about my marriage, the JW's and how much I was coming to hate the religion, etc. Come to think of it, I had to be careful no matter what I was looking at because he was such a tight-ass. Like your husband, mine took to coming in at all hours of the night to see what I was up to. Funny story: He used to just walk up behind me and stand there with his arms crossed waiting for me to say something or turn around. After he did that a bunch of times, I started ignoring him. No way was I playing his little control game! So when I was visiting a boyfriend a few years ago, I couldn't sleep so I was online...he came up and stood in the hallway and just waited for me to turn around. Old habits die hard, and I completely ignored him LOL. He was butthurt over it, though. The next morning he was all grumpified and I had to explain why I had ignored him. But yeah, my ex was a complete prude and was trying to monitor what I was doing online. What the hell makes these JW men think they OWN us?? I couldn't watch what I wanted, read what I wanted, listen to music that I wanted...they all had to be approved by him or I had to be a friggin' sneak, which I HATE. Imagine my surprise when I came home and caught him whacking off and watching porn!
However, I did "clean up after myself" when I was done on the PC. I installed a program called CCleaner...it deletes pretty much everything you've done. That really helped because then there was no trail for the sites I visited, therefore, no evidence that I was venting about things.
Now it's a few years later and I have my own laptop and BF has his PC. I go on whatever sites I want (*cough* even porn), he doesn't care what I do online. Once in awhile he'll ask what I'm up to as a way to make conversation. Or he'll show me stuff on his PC and I'll show him stuff on my laptop. He knows I come here. He knows it's therapeutic at times. He really couldn't care less what I do online. But I know what it's like to have to hide and be sneaky. It makes you feel so dirty!