PokerStars No-Limit Hold'em, $4.00 BB (4 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

BB ($92.60)
UTG ($844.20)
Button ($75.65)
Hero (SB) ($400)

Preflop: Hero is SB with A, Q
UTG bets $12, 1 fold, Hero calls $10, 1 fold

Flop: ($28) A, A, 3 (2 players)
Hero checks, UTG bets $20, Hero calls $20

Turn: ($68) 2 (2 players)
Hero checks, UTG checks

River: ($68) 10 (2 players)
Hero bets $44, UTG raises to $238, Hero ??



Just totally lost here. all I can think is that he is running some type of missisippi bluff , but that seems pretty insane here considering by river betting range is a lot of Aces and FHs. maybe pocket 10s? weird. id expect all his aces except really weak to bet turn