No-Limit Hold'em, $0.05 BB (4 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

UTG ($6.80)
Button ($6.98)
Hero (SB) ($5.10)
BB ($4.63)

Preflop: Hero is SB with 5, K
2 folds, Hero bets $0.18, BB calls $0.15

Flop: ($0.40) K, 3, 8 (2 players)
Hero bets $0.30, BB calls $0.30

Turn: ($1) 2 (2 players)
Hero bets $0.60, BB calls $0.60

River: ($2.20) 3 (2 players)
Hero bets $1, BB raises $3.53 (All-In), Hero calls $2.53

Total pot: $9.26

Villain was 34/12 over not many hands, no real history.

This play seems really strange, I remember being 70% sure he had a naked Ac on the turn and 80-90% by the river, mostly due to timing tells. River bet was sized to encourage him to come over the top.

Is this spew or should you go with your reads in this situation?