If she does the laundry in the house, she already knows. LOL.
There are many other factors that she can figure out if you are wearing panties or not.
I know this is true with my wife, she is definitely more observant than I am. I find that most women are more observant than men.
When I figured out that women’s panties are much more comfortable then men’s underwear, I switched over to wearing panties and I literally told my wife the truth that I have switched.
Currently, my wife doesn’t approve of my dressing but she has accepted that all I wear is women’s panties. When she asked me why, I told her that they sit properly, the band doesn’t roll down and I find that it holds myself better than men’s underwear. All she said was, “Oh ok.”
Hugs and Kisses,