Our Jasmine finally blooms

Hi All;
We don't know how long ago this pot was set on top of one of our planter boxes... A guess is 2012.... But it has grown its roots out of the original pot and spread down into the planter box!
It has been climbing and growing ever since.  It seems not to care that it is winter outside, it clings to the single pane window glass!


This is the first time that it has ever bloomed !   We don't know why...