QQ in 3bet pot riverline

Originally posted by vandeuren
PokerStars - $0.10 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

BTN: 80.6 BB
SB: 143.3 BB
Hero (BB): 103.9 BB
UTG: 93.7 BB
MP: 100 BB
CO: 140.9 BB

SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Q♦ Q♠

fold, fold, CO raises to 2 BB, fold, fold, Hero raises to 7 BB, CO calls 5 BB

Flop: (14.5 BB, 2 players) T♦ 8♥ 2♦
Hero bets 10.6 BB, CO calls 10.6 BB

Turn: (35.7 BB, 2 players) 5♣
Hero bets 22.1 BB, CO calls 22.1 BB

River: (79.9 BB, 2 players) K♠
Hero checks, CO bets 76.3 BB, Hero calls 64.2 BB and is all-in

Spoiler

CO shows 4♦ A♦ (High Card, Ace) (Pre 33%, Flop 44%, Turn 32%)
Hero shows Q♦ Q♠ (One Pair, Queens) (Pre 67%, Flop 56%, Turn 68%)
Hero wins 198.9 BB

no stats on villain; only info he's 19 years from russia ( so im assuming he might be a bit more aggressive, just read mbml tips on gathering player reads )

is it better to bet/fold on river here, and what sizing should i use then?