Anakin
It's not entirely surprising. This situation is strange to begin with. And on top of that the discrepancies in time? It is a great deal to take in.
You know better than anyone the pitfalls of embracing the dark side, Anakin. Even if you haven't fully experienced that yet. Something must have inspired him to turn. It's likely you can parse through that better than I can. And you are family. If he searches his feelings that may be clearer to him.