Russia will, covertly, and through operatives, ramp up the civil strife until it becomes "clear to all" that (a) the Ukrainian government cannot keep it under control, and (b) the people in that region are suffering, and after a failed attempt to get the UN to step in, Russia will be "invited" in by the local and regional governments, and that will be all she wrote.
It won't be under the guise of an actual invasion, there won't be lots of tanks rolling in mass formations, and the Ukraine government won't be able to oppose it.
And so Russia will get a permanent "peacekeeping" presence in Ukraine, and there won't be a damned thing Bidet can do about it.