Simple but confused with AK

[stillbr]

5-handed

Completely unknown player who just sat down one orbit ago raises UTG. LAG coldcalls in the CO. I 3-bet AdKd on the button. Blinds fold. Unknown caps it. Lag calls 2 again. I call.

Flop: 8s8h3d

Unknown Bets, Lag calls, I call?

Turn: 9c

Unknown bets, Lag folds, I fold?



1. Is this standard against a completely unknown? Should I have raised the flop?

2. What if the Unknown was a Lag aswell?