Thats not how relativity actually works. Two objects cannot, in fact move apart from each other faster than the speed of light.
The objects -can- move apart at more than the speed of light -- B will actually conclude they do!. But the objects themselves can't observe eachother doing so.
There's reason to assume that there are a lot of objects moving away from us at more than the speed of light. They're just a tad further away than the objects moving away from us at nearly the speed of light, and they move so fast (relative to us) that their light will never reach us.