A good sign

(Photo taken 20th June 2012)

Anyone, please enlighten me the name of the flower?

Just recently, among all the long-planted pot plants, a flower the size of 1.5 of my palm size was blooming. It has pretty big bud seeds, half way emerged from the soil, and these green, long leafy leaves just like lily's. I googled it but the flower looks like none of those lilies on the net. Being a noob with flowers, i've just realised that lilies come in all kind of shapes, sizes, colors, and patterns but none of them look like mine.

My green-finger mother in law planted these pot plants and it has been ages for a flower to bloom. Once bloomed and dies off, the leaves have to be removed and the seeds are to be wrapped in plastic bags and stored in the freezer to be planted again for the next season (plant mid-late winter and bloom in Spring around chinese new year). If it's to bloom in spring, why does it bloom now?

And that's for a flower noob to figure out!