200 NL: Folding my set deep

[AcesUp2121]

200 6 max on Stars. Villain is unknown. Note that 9 times out of 10 I am raising this flop. I felt that villain was very weak, however. Does my underrepping my hand here turn this river into a call?

PokerStars No-Limit Hold'em, $2 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Button ($78.40)
SB ($198)
BB ($168.70)
UTG ($325.25)
Hero ($421.85)

Preflop: Hero is MP with 9, 9.
UTG raises to $8, Hero calls $8, 3 folds.

Flop: ($19) K, 7, 9 (2 players)
UTG bets $10, Hero calls $10.

Turn: ($39) Q (2 players)
UTG checks, Hero bets $25, UTG calls $25.

River: ($89) A (2 players)
UTG checks, Hero bets $55, UTG raises to $282.25, Hero folds.

Final Pot: $199