NL50: AA on paired board gegen strong villain line

[von7thal]

PokerStars No-Limit Hold'em, $0.50 BB (5 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: ITH Forums)

Button ($30.75)
SB ($30.15)
BB ($28.95)
Hero ($53.95)
MP ($49.25)

Preflop: Hero is UTG with :as, :ah.
Hero raises to $2, 2 folds, SB calls $1.75, 1 fold.

Flop: ($4.50) :6d, :6h, :7c (2 players)
SB checks, Hero bets $3.1, SB calls $3.10.

Turn: ($10.70) :3d (2 players)
SB checks, Hero bets $7.3, SB calls $7.30.

River: ($25.30) :th (2 players)
SB bets $17.75 (All-In), Hero ?

villain: 60/0/1.0 über 5 hände..

wie spielt ihr river?
kann man das folden?
c/c flop, c/c turn donkbet river --> nuts?