I have been crossdressing for the past 15 years but I started wearing my sisters gym knickers when I was about 12 or 14. I got caught by my sister and mother that put a stop to it. However it was always there and I returned to wearing panties as soon as possible in secret until I confessed to the wife one day. Luckily she was expecting of that much to my relief. Now she is aware of my crossdressing and insisted I keep it to myself.