-Haven't played many hands with villain, but he seems like an average player
-Villain is 30/10/4 over a few hundred hands

How's the turn line? Is a flat call of his raise better?
I know I've heard lots of people say "don't fold a set", so I'm assuming
this is an obvious turn call to the push?

Cryptologic
No Limit Holdem Ring game
Blinds: $0.50/$1
5 players
Converter

Stack sizes:
UTG: $44.21
CO: $170.25
Button: $140.50
SB: $39
Hero: $152.50

Pre-flop: (5 players) Hero is BB with
2 folds, Button calls, SB calls, Hero checks.

Flop: ($3, 3 players)
SB checks, Hero bets $1.75, Button calls, SB calls.

Turn: ($8.25, 3 players)
SB checks, Hero bets $6.75, Button raises to $15, SB folds, Hero raises to $44.75, Button raises all-in $137.75, Hero??