Bad time to slow play?

[kevkev60614]

PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (8 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

MP1 (t790)
MP2 (t2100)
CO (t1745)
Button (t3345)
Hero (t620)
BB (t1250)
UTG (t2065)
UTG+1 (t1585)

Preflop: Hero is SB with K/images/graemlins/club.gif, 4/images/graemlins/heart.gif.
<font color="#666666">1 fold</font>, UTG+1 calls t50, MP1 calls t50, <font color="#666666">1 fold</font>, CO calls t50, <font color="#666666">1 fold</font>, Hero completes, BB checks.

Flop: (t250) K/images/graemlins/spade.gif, 2/images/graemlins/diamond.gif, 4/images/graemlins/diamond.gif <font color="#0000FF">(5 players)</font>
Hero checks, BB checks, <font color="#CC3333">UTG+1 bets t50</font>, MP1 folds, CO calls t50, Hero calls t50, BB folds.

Turn: (t400) T/images/graemlins/club.gif <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets t150</font>, UTG+1 calls t150, <font color="#CC3333">CO raises to t400</font>, <font color="#CC3333">Hero raises to t520</font>

CO has been aggro whole game, especially preflop. That's pretty much my only significant read. How would you have played the flop and turn?

2 pair with 2 diamonds and a K on the board and seven players? Yes...I would say that is a bad time to slow play.

I think you might actually be ahead on the turn but have no freaking idea because you didn't learn anything after the flop. CO could have KT or KQ or ATd or any two diamonds or slow played a set or any of ten other hands or nothing at all.

[45suited]

When the betting got back to you on the flop, I would've pushed. The pot was half your stack at that point. Let the guy who paired his king and has you outkicked (or the flush draw) call you now while you're still ahead. No K is folding to what looks like a shortstack's desperation push. Terrible time to slowplay IMO.