($55) A little lost on this QK

[Femto]

Party Poker No-Limit Hold'em Tourney, Big Blind is t50 (7 handed) FTR converter on zerodivide.cx

MP2 (t1935)
CO (t785)
Button (t1105)
Hero (t1855)
BB (t1015)
UTG (t1585)
MP1 (t1720)

Preflop: Hero is SB with Q[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">MP2 raises to t100</font>, <font color="#666666">1 fold</font>, Button calls t100, Hero calls t75, <font color="#666666">1 fold</font>.

Flop: (t350) J[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">MP2 bets t135</font>, <font color="#CC3333">Button raises to t270</font>, Hero calls t270, MP2 calls t135.

Turn: (t1160) 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">MP2 bets t365</font>, Button calls t365, Hero calls t365.

River: (t2255) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets t250</font>, MP2 calls t250, <font color="#CC3333">Button raises to t370 (All-In)</font>, Hero calls t120, MP2 calls t120.

Final Pot: t3365

I figured MP2 for sure didnt have AK, so I'd throw in a CR on the flop, but then button raised before I could, and I turned into a pussy calling station. Was this call okay? Is the blocking bet on the river appropriate? What's your line?