Villian is unknown. I figured he probably wouldn't check to me on the river with a better hand. FWIW, in FR I would always check behind here, but I had this idea in my head about needing to get more value out of overpairs in 6max.

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

UTG ($97.10)
Hero ($100.10)
Button ($55.28)
SB ($160.20)
BB ($84.50)

Preflop: Hero is MP with A, A. SB posts a blind of $0.50.
1 fold, Hero raises to $4, 2 folds, BB calls $3.

Flop: ($8.50) J, 4, T (2 players)
BB checks, Hero bets $7, BB calls $7.

Turn: ($22.50) 3 (2 players)
BB checks, Hero bets $18, BB calls $18.

River: ($58.50) K (2 players)
BB checks, Hero bets $56,
Final Pot: $170