Overpair + NFD on flop

[robinmbuk]

Villian is 40/28/3 over about 35 hands. No reads as I just sat down at the table and stats are from previous session which I didnt make notes on.
Hero($25)
Villian($19)

Pacific Poker
No Limit Holdem Ring game
Blinds: $0.12/$0.25
6 players
Converter

Pre-flop: (6 players) Hero is SB with A[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img]
<font color="#cc0000">UTG raises to $1</font>, UTG+1 calls, 2 folds, <font color="#cc0000">Hero raises to $3.13</font>, BB folds, UTG calls, UTG+1 folds.

Flop: 2[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img] ($7.51, 2 players)
Hero checks, <font color="#cc0000">UTG bets $4</font>, <font color="#cc0000">Hero raises to $21.5</font>, UTG calls.

Results:
Final pot: $50.51

This is standard right? What about the flop check? I figured he is agro enough to bet in a pot so large when checked to, and if he checks behind there aren't many cards coming that will worry me too much anyway. Standard shove? Anyone play this differently? I think maybe raising to closer to $4 pf given the raise and a call.