Overpair facing Limp/RR from Loose player

[skates]

Full Tilt Poker - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $53.30
BB: $47.50
UTG: $41.85
MP: $54.40
Hero (CO): $78.35
BTN: $61.75

Reads: <font color="blue">Loose/Spewy. Lots of PF limping.</font>

Preflop: Hero is dealt J[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/heart.gif[/img] (6 Players)
UTG calls $0.50, MP folds, <font color="red">Hero raises to $2.50</font>, 3 folds, <font color="red">UTG raises to $8.25</font>, Hero calls $5.75

Flop: ($17.25) 4[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">UTG bets $17.25</font>, <font color="red">Hero raises to $34.50</font>

Is this a fold preflop? What about on the flop? Villain has been limping and raising alot of pots. I call preflop figuring his range is wayyyy too wide to find a fold, perfectly willing to play the pot IP, though aware that the limp/RR UTG is AA/KK often. I'm starting to think that PF Shoving&gt;&gt;folding&gt;&gt;calling here, since I'm out given a CBet on even low flops.

However, Villain bets the pot on the flop, which was uncharacteristic of him and is generally weird. Most people that play AA/KK/QQ this way do a regular CBet on the flop, or sometimes underbet it. I figure he's representing something he doesn't have, so I shove for value from AT or AJ+. Thoughts?