Sorry if this is a basic question. Is this the standard line with a flopped set? Opp's stats were 19/7/2.3 over 140 hands. Checking the turn trying to get another bet out of opp is just too suspicious after I re-raise the flop, right?

PokerStars No-Limit Hold'em, $0.50 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP2 ($56.55)
MP3 ($29.15)
CO ($10)
Button ($48)
Hero ($63.30)
BB ($19.15)
UTG ($8.70)
UTG+1 ($57.15)
MP1 ($38)

Preflop: Hero is SB with 4, 4.
3 folds, MP2 raises to $1.5, 3 folds, Hero calls $1.25, 1 fold.

Flop: ($3.50) 5, K, 4 (2 players)
Hero bets $1.5, MP2 raises to $3, Hero raises to $9, MP2 calls $6.

Turn: ($21.50) 8 (2 players)
Hero bets $15