live $6/12 - 2nd nuts - when to stop raising

[obi_wang]

live $6/12 table not too much action. a few TAG, some loose-passive. villain is new to table.

i limp after 2 callers in middle position with K [img]/images/graemlins/diamond.gif[/img] J [img]/images/graemlins/spade.gif[/img]

5 players to the flop.

Flop: K [img]/images/graemlins/heart.gif[/img] 9 [img]/images/graemlins/club.gif[/img] 6 [img]/images/graemlins/heart.gif[/img]

i bet out, villain insta-calls behind me, 2 others call.

turn: J [img]/images/graemlins/club.gif[/img]

i bet, villain insta-calls, 1 other call.

river: J [img]/images/graemlins/heart.gif[/img]

i bet, villain raises, other player folds, i 3-bet, villain 4-bets, i 5-bang, villain 6-bangs, i call with 2nd nuts.

only KK beats me, and who the hell plays KK like that, right? should i ever stop betting here? what about pf?