Dude I didn't even know that was possible. 

It will be, Kat is actually going to enjoy it I think. I can not straight out that she won't go off course of the spell a little to just watch the memory. Though she will go back towards the spell instead of what lead up to it if that makes sense.

I think it's because so far their kind of new. Like its only been four years. But that's just my guess.