Hey, I found a picture of your grandmother on the internet.
This lovely lady is Zhang Ruifang, a 100 year-old Chinese woman. The story I found about her on Oddity Central reports the horn only began growing last year, so she is really horny. I am sorry for grabbing all of this low-hanging fruit. What am I, Jay Leno? It has got to be hard to sleep with that thing, poor lady.