qq overpair slowly, river shove?

[daven]

villain is unknown 25-13 over less than 50 hands.
3-bet pre is most of the time, but not always. I've under-repped my hand by the time river comes - raise to?

Full Tilt No-Limit Hold'em, $1.00 BB (9 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

CO ($130.10)
Button ($101)
SB ($21.65)
BB ($196.50)
UTG ($102.50)
UTG+1 ($78.20)
MP1 ($100)
MP2 ($101)
Hero (MP3) ($100)

Preflop: Hero is MP3 with Q, Q
1 fold, UTG+1 bets $3, 2 folds, Hero calls $3, 4 folds

Flop: ($7.50) 7, 7, J (2 players)
UTG+1 checks, Hero bets $7.50, UTG+1 raises to $15, Hero calls $7.50

Turn: ($37.50) 2 (2 players)
UTG+1 checks, Hero checks

River: ($37.50) 8 (2 players)
UTG+1 bets $14, raise to?

[badgers]

meh. call he can have KK+

[Deanglow]

3bet nonfullstack unknowns with QQ always and call river

[sk8r_daniel]

You gain value from AJ and that is about it when you raise the river.