[crownjules]

I'm not raising the flop since you're not protecting at all against anyone. Not to mention, with bottom pair on this highly-coordinated board, I can't think that I have the best hand very often at all.

I don't think the turn is a donkbet. SB probably called the flop figuring you for AA/KK, and now he just tripped up. Figure you have 4 outs for the K, and maybe 1 out each on the A and T (for the times SB is betting the J or a K/9), you can call. I would fold the river.

EDIT to include that I usually toss AT UTG.