[Closed] [NL50 FR Rush] AJo too thin on river?

Hand converted with online PokerStrategy.com hand converter:

Play hand

$0.25/$0.5 No-Limit Hold'em (9 handed)

Known players:
[tg]MP1 (Hero)$52.50:///////;MP2$25.55:///////;MP3$29.25:///////;CO$59.35:///////;BU$71.25:///////;SB$21.55:///////;BB$50.75:///////;UTG1$21.60:///////;UTG2$21.65:///////;[/tg]

Preflop: Hero is MP1 with J:s, A:c.
UTG1 folds, UTG2 calls $0.50, Hero raises to $2.25, 6 folds, UTG2 calls $1.75.

Flop: ($5.25) 8:s, 4:c, Q:s (2 players)
UTG2 checks, Hero bets $3.50, UTG2 calls $3.50.

Turn: ($12.25) 2:c (2 players)
UTG2 checks, Hero checks.

River: ($12.25) A:s (2 players)
UTG2 checks, Hero bets $46.75(All-In), UTG2 calls $15.90.

Final Pot: $74.9.

Confirm bad sizing v unknown please.