Very awkwardly played set - 2/4 flopped set vs. mused

[JrJordan]

Villain is mused01, a regular TAG in the PS 2/4 game. I have him playing 19/12 so far in this session and we haven't really tangled in any pots so far. I did see him get way overaggro postflop vs. a Preflop LAG/postflop calling station and get stacked on a paired board with a weak TP.

PokerStars No-Limit Hold'em, $4 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($410.10)
SB ($734.50)
Hero ($400)
UTG ($400)
MP ($421.40)
CO ($803.50)

Preflop: Hero is BB with 3[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">UTG raises to $12</font>, <font color="#666666">4 folds</font>, Hero calls $8.

Flop: ($26) T[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $18</font>, UTG calls $18.

I donk hoping to get a bet/3bet line in if he's still feeling overaggro like the last hand vs. the LAG/CS. I'd also play a combo draw like this and there seem to be a decent number of them out so I'm hoping to represent.

Turn: ($62) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">UTG bets $44</font>, Hero calls $44.

I don't know if he would raise the flop with a flush draw, but I'd still like to see the river for cheap in case he does have it. I don't think there's much value in betting vs. an overpair since the flush and 79 both got there unless he has the paired heart. Also if it gets checked through and a river heart hits, I can check to induce a bluff with the weak flush. I'd love to hear some thoughts on other possible lines.

River: ($150) 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $70...</font>

Comments on the river bet. Also, what's the plan in case he comes over the top.