Poker Stars, $0.02/$0.05 No Limit Hold'em Cash, 8 Players

UTG+2: $2.61 (52.2 bb)
Hero (MP1): $15.54 (310.8 bb)
MP2: $5 (100 bb)
MP3: $4.73 (94.6 bb)
CO: $6.35 (127 bb)
BTN: $1.96 (39.2 bb)
SB: $5.07 (101.4 bb)
BB: $5 (100 bb)

Preflop: Hero is MP1 with A A
UTG+2 folds, Hero raises to $0.15, MP2 folds, MP3 calls $0.15, 4 folds

Flop: ($0.37) K K 8 (2 players)
Hero bets $0.20, MP3 calls $0.20

Turn: ($0.77) A (2 players)
Hero checks, MP3 bets $0.30, Hero raises to $0.80, MP3 calls $0.50

River: ($2.37) K (2 players)
Hero bets $1.20, MP3 raises to $3.58 and is all-in, Hero ??

V=45/6, 7.3 3bet, 119 hands

Curious to see what everyone thinks here.

Btw I CRAI turn because I figure it's about the same as c/c, lead river, he's gonna check back or fold river a massive amount of time if I c/c turn.