10nl 55 flops a set

[invizyn]

PokerStars No-Limit Hold'em, $0.10 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($7.10)
BB ($21.35)
UTG ($11.20)
UTG+1 ($5.20)
MP1 ($9.85)
MP2 ($9.90)
MP3 ($7.30)
Hero ($9.20)
Button ($7.70)

Preflop: Hero is CO with 5, 5.
5 folds, Hero calls $0.10, 2 folds, BB checks.

Flop: ($0.25) 9, 3, 5 (2 players)
BB checks, Hero checks.

Turn: ($0.25) A (2 players)
BB checks, Hero bets $0.2, BB calls $0.20.

River: ($0.65) A (2 players)
BB bets $0.9, Hero raises to $2.7, BB raises to $21.05, Hero calls $6.20 (All-In).

Final Pot: $18.45

Standard? Maybe could have bumped it up PF to .3 or .4 but other than that, does anyone play this differently? Unknown guy at 10nl could easily do this with a weak ace. Thoughts?

[Pelion]

I bet the flop but after that its fine. You are never folding that river to an unknown at 10NL (or anywhere else Ive played)

[Seasider]

Raise flop, there is no way on this earth or any other I fold that river! (This is falling into the I assume it's bad because its posted syndrome)

[martindcx1e]

Of course you shouldn't ever fold this. Bet the flop also plz.