Hero is about $1.3k deep and villain is an unknown player who just sat down and tripled his stack in his first hand so he covers.
Hero opens K
Q
in CO to $15, button and V in SB both call.
Flop 8
3
3
Hero cbets $20 into $45, button jams his short stack in for $110, V cold calls, hero calls.
Turn 8
3
3
K
V leads for $175, hero calls
River 8
3
3
K
6
V quickly checks, hero bets $200, V goes all in for effectively $800 more.
Is this just a fold or?