Big mistake. It was an accident!!
She knew they weren't hers, so then I had to explain that they were mine, and not someone else's!
Next question: Do you wear them? How do I answer that? No, I collect them!
Bad answer. Better think up another one.
How does this sound? I kept finding yours in my drawer, and I sort of wanted to try them on, but I didn't want to wear somebody else's underwear, so I bought some of my own, just to try them on. I wanted to see what it was like.
How do you think that went?
I better be more careful from now on. I know, I know, you're going to tell me I need to tell her the truth, but I can't see that working, at least not right away.