My 3rd hand on the session, let alone the table. I 3-bet this 90% of the time but opted not to this time. Opponent had over $200. My only "read."

Poker Stars
No Limit Holdem Ring game
Blinds: $1/$2
6 players


Stack sizes:
UTG: $215.15
UTG+1: $93.15
CO: $121.65
HERO: $197
SB: $198
BB: $131.40

Pre-flop: (6 players) HERO is Button with
UTG raises to $8, 2 folds, HERO calls, SB folds, BB calls.

Flop: ($25, 3 players)
BB checks, UTG checks, HERO bets $18, BB folds, UTG raises to $52, HERO calls.

Turn: ($129, 2 players)
UTG is all-in $155.15, HERO calls all-in $137.
Uncalled bets: $18.15 returned to UTG.

River: ($403, 0 player + 2 all-in - Main pot: $403)


Results:
Final pot: $403


My hand is so underrepresented. Is this a must call?

easy call for me. You are ahead 1/2 the time at least, and are getting 2:1.

JC