Villain was 56/20/0 (3bet) through 77 hands. Fold to cbet 0%, 0/2.

Had a couple of notes on villain. I had seen him stack off pre with JJ. He also defended his BB in a 3 way pot, with T9s. Flopped an OESD and donked with a small bet before calling a raise. Hits his straight on turn, c/r AI.

PokerStars - $0.05 NL (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

MP: $5.00
CO: $5.00
BTN: $12.23
Hero (SB): $5.09
BB: $8.05
UTG: $14.52

Hero posts SB $0.02, BB posts BB $0.05

Pre Flop: (pot: $0.07) Hero has 5 A

fold, fold, fold, fold, Hero raises to $0.15, BB calls $0.10

Flop: ($0.30, 2 players) 5 A 2
Hero bets $0.20, BB calls $0.20

Turn: ($0.70, 2 players) K
Hero bets $0.50, BB calls $0.50

River: ($1.70, 2 players) 3
Hero bets $1.20, BB raises to $2.40, Hero ???

Why would villain min/r here? The only hands I could put villain on was a flush? What would he min/r this river with that I have beat?

Should I even be betting this river? I think I am betting for value but wasn't expecting a raise.

With villain being in BB and pretty loose, can we put him on any 4x type hand? I can't think of one that he would play this way to the river as he showed he shoves with the nuts, so I don't think he could have 43 and I don't know of any other 4x hand that would get to the river unless it was a 4hxx hand.

Thought and opinions as always appreciated.