KK overpiar+fd monotone board

Prima, $0.25/$0.50 No Limit Hold'em Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

SB: $50.25 (100.5 bb)
BB: $73.08 (146.2 bb)
Hero (UTG): $57.37 (114.7 bb)
MP: $57.13 (114.3 bb)
CO: $50.20 (100.4 bb)
BTN: $32.19 (64.4 bb)

Preflop: Hero is UTG with K K
Hero raises to $1.50, 2 folds, BTN calls $1.50, SB calls $1.25, BB folds

Flop: ($5) 8 Q 2 (3 players)
SB checks, Hero bets $3.50, BTN calls $3.50, SB calls $3.50

Turn: ($15.50) 9 (3 players)
SB checks, Hero bets $11, BTN calls $11, SB folds

River: ($37.50) 4 (2 players)
Hero bets $41.37 and is all-in, BTN calls $16.17

Results:

25/14/561

On turn, should I bet?

and when called by short stack, what should I do river?