Top two pair (AQ) in early position gets raised on the river

[BigDan9]

Villain is 27/2.3/2 over 40 hands or so and more or less unknown.

Ongame Poker No Limit Hold'Em, $1/$2 (10 handed).

SB ($120)
BB ($564)
UTG ($284)
Hero/UTG+1 ($225)
UTG+2 ($206)
MP1 ($143)
MP2 ($100)
MP3 (286)
Villain/CO ($178)
Button ($40)


Preflop: Hero is UTG+1 with A[img]/images/graemlins/spade.gif[/img]Q[img]/images/graemlins/spade.gif[/img]. UTG folds, Hero calls, 4 folds, Villain calls, 1 fold, SB calls, BB checks.

Flop: ($8) A[img]/images/graemlins/diamond.gif[/img]6[img]/images/graemlins/heart.gif[/img]Q[img]/images/graemlins/diamond.gif[/img] (4 players)
SB checks, BB checks, Hero bets 5, Villain calls, 2 folds.

Turn: ($18) 9[img]/images/graemlins/heart.gif[/img] (2 players)
Hero bets $15. Villain calls.

River: ($48) 9[img]/images/graemlins/club.gif[/img]

Hero bets $35. Villain raises to $100. Hero?

Is this a good value bet on the river and, when Villain surprised me and raised, what’s the right move?