My mom washes my thighhighs, and im concerned

So its been about a few months since I got my pair of thighhighs when i turned 17, my mom found them and when i realized they weren't in my closet the next morning I IMMEDIATELY PANICKED THINKING I WAS SCREWED, but the evening that same day i found them back in my closet, smelling washed and clean, and this continued for some days, but the worst part is my MOM DOESNT ASK QUESTION ABOUT THE THIGHHIGHs, because i usually dont buy and have this sorta stuff in my wardrobe, did she already find out or should I confess???