Breast leaking milk

Its been almost 2 yrs since ive breastfed, well few weeks ago one breast was leaking milk, and tonight both them are producing milk. How is that possible??

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About Aundreya
Birth: July 24
On Moms.com since: Jan 9, 2014
I got pregnant at 18, had him month after I turned 19. Currently 21. I work full time, full time student and full time momma to Mr. Carter Layne Kennedy. He was born august 23rd,2012. Was born 2w3d early. 6lbs 7oz 21in. I had a VERY hard pregnancy.