Widow does not show signs of pre-flowering, these pisitils that have appeared untill now I think are related to the "sex showing/display" fase and not pre-flowers as her bubblegum sisters have. Could be that Indicas show off differently, or later, idk.
I do know that Widow has a longer mature time so, should be that :)
Day 29 she is showing a lot more pistils now, I can feel she is going into pre-flowering, slowly.
She is going to get leggy if you don't move light closer. I would buy a good cfl and hang it 1 inch away from the top until she gets bigger (2-3 weeks).
oh, they're actually in the balcony for the moment as I will only get the grow tent next month, they get close to 10 hours of light of which about 6 are direct sunlight, next month they are moving into the dark street 60*60*120 grow tent