The other day I peered into the heart of an African Violet to check on the progress of new leaves that were budding, and saw this growing.
I looked in the other plant and that one has buds, too. They are still so small and hidden it is like a secret the plant is keeping from me. Not noticeable unless you look very very closely. You don't know how excited I am about this- I wondered if they ever would bloom again.
The key is light. If your violets won't rebloom, give them more light!