$5 NLHE 6-max: KK as bluff in SRP

I think he must fold the river. it would be better have a K of diamonds for me. How do you think it was normal call from the opponent?

$0.02/$0.05 No Limit Holdem
888
6 Players
Hand Conversion Powered by WeakTight Poker Hand History Converter

Stacks:
UTG ind1go33 ($5.01) 100bb
UTG+1 Hero ($9.15) 183bb
CO TPOH888 ($7.54) 151bb
BTN naksel ($6.68) 134bb
SB Glush1 ($5.53) 111bb
BB TomS62 ($1.59) 32bb

Pre-Flop: (0.07, 6 players) Hero is UTG+1 K K
1 fold, Hero raises to $0.13, TPOH888 calls $0.13, 3 folds
Flop: 3 10 A ($0.33, 2 players)

Hero checks, TPOH888 checks

Turn: J ($0.33, 2)
Hero bets $0.18, TPOH888 raises to $0.69, Hero raises to $1.96, TPOH888 calls $1.27 River: 7 ($4.25, 2)

Hero bets $7.06, TPOH888 goes all-in $5.45

Final Pot: $16.76
Hero shows
K K
TPOH888 shows
J J

TPOH888 wins $14.26 (net +$6.72)

Hero collects $1.61 (net -$7.54)