You raise here for value. While its possible that the small blind was sitting on QK for a gutshot straight draw, the 10 is a relatively safe card. IMO, the only straight draws still in hte pot are going to be open ended, and therefor already contain a 10, such as 10/8 or 10/Q. Either way, the 10 paired them with the second pair, and its probable that they will not put you on a jack once the second jack hit the board.
Another possibility is that they have the fourth jack. If thats the case, you're likely ahead as they're probably playing QJ or KJ. I do not think this is the case however, because they aren't showing too much strength on the turn. Trip jacks surely would have raised here. Pocket 10s is a possibility for the boat, but again, you can't second guess yourself here, and you have to raise for value. You're getting the odds
to raise here because You only will have to win this pot 1:8 times or so to break even, and quite frankly, trips with ace kicker is more than 1:8 to win.
By the way, I'd like to point out that its a bit tougher to make a desision w/o the preflop action. A strong action from teh SB could indicate a big PP like AA QQ or TT. Without this, i'm just going to assume everyone limped in, no strength shown. So, thats why i'm shrugging off 10/10 so easily.