My Co-Worker Has Asked Me To Stop Using My Cologne!

Buzz Question - So the other day my co-worker came up to me and said SHE was allergic to my cologne and if I would stop using it. I literally thought she was kidding. I told her the kind of cologne I use and  said she just breaks out when she's around me. Um,  I don't want to be a JERK, but I've been using this cologne for a while and I have spent good money on it....What would you do?