Are you gay? I swear im not trying to be funny. Cuz if you are then its understandable i guess... But if ur not 0_o
I think you should Get Real.
Tell her you have been thinking about it and you still want to wear them. Then go buy some.
Is this a fetish? I for some reason can not see that
your mum will agree
to her big boy wearing girls panties. If you had a son what would
you say to this? Is there other tendencies?
Your mother has made her decision. You cannot control her desires. What you can control is your desires. Become independent. Once you are on your own, what you want for you rules and others must yield for a change.
I think you should grow up. In a couple of years, you can shop Victoria's Secret to your heart's desire. Right now, you should respect your mom's wishes.
Offer to go shopping with her. She might like the idea of getting a lower price because you're buying in bulk.