Villain is 43/8 over a pretty small sample (like 80 hands). How often is this an ace or something like 77?

PokerStars No-Limit Hold'em, $0.10 BB (5 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($19.55)
Hero ($9.10)
SB ($7.60)
BB ($10)
UTG ($7.05)

Preflop: Hero is Button with 8, 9.
2 folds, Hero raises to $0.4, SB calls $0.35, 1 fold.

Flop: ($0.90) J, J, 3 (2 players)
SB checks, Hero bets $0.8, SB calls $0.80.

Turn: ($2.50) 3 (2 players)
SB checks, Hero checks.

River: ($2.50) T (2 players)
SB bets $2.5, Hero