No. She has no idea. That's just the way it has to be. Been doing it for years. I have my own stash of lingerie that I use but I like her things once in a while. I know the feeling of the pantyhose against my erection. The cum through the hose is very sexy.
Does she like to find your cum in/on her bras? My ex used to throw out her ruined pantyhose. I would pull them out of the trash and cut off the foot section and stick my cock in them and fuck them til I shot my load and then watch it seep through the nylon. Pretty sexy!
As soon as I started watching I was masturbating with one of my wife's tan bras. I watched him cum all over her bra and I hade an orgasm all over both cups of my wife's bra. Will watch again.