2-4 crypto K7o from the blind TPWK

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I've only been at the table for about 10 hands (but villian, SB seems rather loose and on the aggressive side ... the only hand I saw to showdown was a hand where he raise with AQ on JT9 flop and bet/3bet a turned Queen, and called down a cap) .. also note, I've only been in one hand I think in which I fold to villian's turn bet

I'm dealt K [img]/images/graemlins/spade.gif[/img]7 [img]/images/graemlins/heart.gif[/img] in the blind and see a flop after
a loose passive UTG limps, and sb limps

FLOP: K [img]/images/graemlins/club.gif[/img]5 [img]/images/graemlins/diamond.gif[/img]J [img]/images/graemlins/club.gif[/img]
sb check raises after I Lead out and UTG calls, me and UTG call

<font color="#666666">I hate these spots, an aggressive villian could be check raising a lot of stuff here - flush draws straight draws, 2nd pair ... or should I give a little more credit since UTG is in as well</font>

TURN: 9 [img]/images/graemlins/heart.gif[/img]
SB Leads out
<font color="#666666">I don't like this card at all, easily gives villian two pair (hands like K9 or J9) and completes a straight (QT) ... I think for a second, and figure there is a good chance UTG will call, providing some overlay, and decide to go to showdown (unless UTG wakes up, or perhaps a spade shows up - which is all I'm really left with)</font>

Is this too weak of a holding in this spot, to warrant a call down?