Top two pair runs into resistance

[Siegmund]

How far are you willing to go with two pair before you are sure a set has beaten you?

Action Poker $1/2, 9-handed. Loose table, lots of 5- or 6-way flops, about half the hands get raised by somebody preflop. No specific reads on the villains.

Hero has [img]/images/graemlins/spade.gif[/img]K[img]/images/graemlins/spade.gif[/img]7: in the cutoff.

UTG folds, UTG+1 calls, UTG+2 calls, 2 folds, Hero calls, button calls, SB folds, BB raises. Everybody calls.

(10.5 SB) Flop: [img]/images/graemlins/diamond.gif[/img]K [img]/images/graemlins/heart.gif[/img]7 [img]/images/graemlins/diamond.gif[/img]3.

BB bets, UTG+1 calls, UTG+2 calls,
<font color="red"> Hero raises </font> .. and now the fun starts:

Button reraises, BB caps, UTG+1 folds, UTG+2 folds, Hero calls, Button calls.

Turn (12.5 BB): [img]/images/graemlins/club.gif[/img]Q

BB checks, <font color="red"> Hero bets </font>, Button raises, BB reraises.

Scary, but getting 9:1 on the full house draw if I am behind. So I see the river...

River (21.5 BB): [img]/images/graemlins/club.gif[/img]A

At least the flush didn't come in. Maybe someone was on a draw.

BB bets....

I hate my chances - I doubt I win 5% of the time here - but it doesn't feel right to fold. The button might pop this though - worried I'll get soaked for 3 bets if I put in one.

Suggestions welcome on my line at any stage here.