NL100: AA gegen aggression

[VinniePaz]

No-Limit Hold'em, $1.00 BB (6 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

MP ($110.10)
CO ($18.50)
Button ($22.41)
SB ($19)
BB ($106.02)
Hero (UTG) ($104.25)

Preflop: Hero is UTG with :ah, :ad
Hero bets $3.50, MP calls $3.50, 4 folds

Flop: ($8.50) :8c, :4h, :2d (2 players)
Hero bets $6, MP raises $12, Hero calls $6

Turn: ($32.50) :6c (2 players)
Hero checks, MP bets $21, Hero calls $21

River: ($74.50) :2h (2 players)
Hero checks, MP bets $73.60 (All-In), Hero???

Villain 20/16