I disagree. I'm not sure it's provable(maybe in professional poker players??), but if you've played the bet a lot of times, you could have come up with cues* about whether your friend has got the same roll(or number on the die) as the last time or not.
So you should update after you see that she rolled some number, and saw her reaction - but this says nothing about updating again because she wrote the number down,
Another month, another rationality quotes thread. The rules are: