SB is whale station
UTG+1 is 36-4 over 40, no aggro, got some of his stack by limp-calling AA from utg, then c-calling J93hhd, Js, then a river checked through 8d.
So, his calling range on this flop is all sets, all Kx, KT/T7s, QJ, AJ, AQ/89s/J9s.
I doubt his turn calling range is much different.
Thoughts on turn and river sizing?

Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) - Full Tilt Converter Tool from FlopTurnRiver.com

Button ($111.25)
SB ($35.10)
BB ($77.35)
Hero (UTG) ($50)
UTG+1 ($61)
MP1 ($52.75)
MP2 ($50)
MP3 ($25.50)
CO ($63.85)

Preflop: Hero is UTG with K, A
Hero bets $1.75, UTG+1 calls $1.75, 5 folds, SB calls $1.50, 1 fold

Flop: ($5.75) 10, K, 7 (3 players)
SB checks, Hero bets $4, UTG+1 calls $4, SB calls $4

Turn: ($17.75) 5 (3 players)
SB checks, Hero bets $12, UTG+1 calls $12, 1 fold

River: ($41.75) 6 (2 players)
Hero bets $xx,