77: Overpair against aggression

[billy51]

SB has been playing aggressively. For example, a few hands before this he bet unimproved overcards into one opponent on the flop, turn, and river and was called each time. I hadn't seen him 3-bet a flop yet (over about 30 hands), but even so I felt folding was too weak. Thoughts?

Party Poker 0.5/1 Hold'em (10 handed) converter

Preflop: Hero is MP2 with 7[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, Button calls, <font color="#CC3333">SB 3-bets</font>, <font color="#666666">1 fold</font>, Hero calls, Button calls.

Flop: (10 SB) 3[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">Hero raises</font>, Button folds, <font color="#CC3333">SB 3-bets</font>, Hero calls.

Turn: (8 BB) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls.

River: (10 BB) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls.

Final Pot: 12 BB

[Jakesta]

I like calling down on all streets.

[billy51]

[ QUOTE ]
I like calling down on all streets.

[/ QUOTE ]
Even on the flop? Seems like we need to raise the flop to fold the button in case he is holding overcards.

I get kind of lost though after the flop 3-bet. Do I go ahead and give villian credit for a better hand?