Villain is 50/10/.03.

Is the river value bet standard? ..bet/fold? Why or why not? Thx

PokerStars No-Limit Hold'em, $2 BB (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($99.25)
BB ($69.25)
UTG ($233.75)
Hero ($196)

Preflop: Hero is Button with 7, 8.
UTG calls $2, Hero calls $2, 1 fold, BB checks.

Flop: ($7) 7, 4, 5 (3 players)
BB checks, UTG checks, Hero bets $6, BB folds, UTG calls $6.

Turn: ($19) 6 (2 players)
UTG checks, Hero bets $12, UTG calls $12.

River: ($31) 7 (2 players)
UTG checks, Hero bets $25???