NL50 KQo Donks into 4way pot, gets raise by PFR

[Parvex]

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($60.30)
UTG ($21.50)
MP ($47.85)
CO ($39)
Button ($54.65)
Hero ($49.50)

Preflop: Hero is SB with Q[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $2</font>, CO calls $2, Button calls $2, Hero calls $1.75, <font color="#666666">1 fold</font>.

Flop: ($8.50) T[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets $7</font>, <font color="#CC3333">MP raises to $21</font>, CO folds, Button folds, Hero ???

MP ist 22/11/2.5 over ~750 hands.
CO is 22/0/1 over 234 hands.
Button is 50/11/2 over 71 hands.
No reads besides that.

What to do on flop? I'll donk this flop with Sets and some good draws (inclunding monster draws obv) as well, maybe not that often with total air (more never than ever), for your information.
Also: How is my preflop call? Thought the participation of CO and Bu could make it somewhat profitable, but I'm still playing oop with a kind of marginal hand if you look at MPs PFR.