Underepped AK against regular (NL$50 6-max)

[DoctorHandles]

Villain is one of the best full tilt regulars I've seen at NL$50. He runs at about 20/17.

Full Tilt No-Limit Hold'em, $0.50 BB (6 handed) Converter Tool from (Format: Bet The Pot)

Hero ($49.75)
SB ($19.50)
BB ($173.70)
UTG ($77.80)
MP ($54.15)
CO ($132.70)

Preflop: Hero is Button with , . UTG posts a blind of $0.50.
MP raises to $1.75, 1 fold, Hero raises to $6, 2 folds, MP calls $4.25.

Flop: ($12.75) , , (3 players)
MP checks, Hero checks.

Turn: ($12.75) (3 players)
MP bets $9.5, Hero calls $9.50.

River: ($31.75) (3 players)
MP bets $38.65 (All-In), Hero calls $34.25 (All-In).

Final Pot: $100.25

I used to always bet aces/draws/bluffs on these flops and check behind JJ-KK. I know it's not necessary at these levels but I'm trying to get better at taking the same line with different hands.

Is this river a snap call? Thoughts?

[Semillon]

[Twelver]

[rdale]

[DoctorHandles]

[rdale]