Tricky flop spot with AK vs 2 opponents 10/20

[MATT111]

MP is a long time regular in this game and supposed to be pretty good. He`s on the loose side preflop but nothing crazy. I decide to call to let SB in who is a huge calling station type fish. He won a big pot vs me earlier when he rivered a str8 after he peeled the flop and turn with a gutshot. He is 60/5/1 with 32% wts.
What does the TAGs c/r mean? He probably vies me as reasonably aggressive but I dont think he thinks I am gonna stab here super light given SBs tendencies. What are we doing now and what`s my plan for the rest of the hand?


Party Poker No-Limit Hold'em, $20 BB (6 handed) Hand History converter Courtesy of PokerZion.com

SB ($2101.96)
BB ($3516.50)
UTG ($1960)
MP ($1917)
CO ($7748)
Hero ($2477)

Preflop: Hero is Button with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $70</font>, <font color="#666666">1 fold</font>, Hero calls $70, SB calls $60, <font color="#666666">1 fold</font>.

Flop: ($230) A[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, MP checks, <font color="#CC3333">Hero bets $170</font>, SB calls $170, <font color="#CC3333">MP raises to $485</font>,