[Closed] SH 1/25 52 BB Hand-reading?

I have a hard time believing he slowplayed with what he did, I think he might have turned the flush or spiked a pair but most likely has air.
Also I'm not sure about betting the turn OOP in an unraised pot with the weakest pair.

Hand converted with online PokerStrategy.com hand converter:

Play hand

$0.1/$0.25 No-Limit Hold'em (6 handed)

Known players:
[tg]BU$14.67:///////;SB$32.94:///////;BB (Hero)$25.00:///////;MP2$28.38:///////;MP3$25.00:///////;CO$24.65:///////;[/tg]

Preflop: Hero is BB with 5:d, 2:s.
3 folds, BU calls $0.25, SB folds, Hero checks.

Flop: ($0.6) 6:h, Q:h, 6:s (2 players)
Hero checks, BU checks.

Turn: ($0.6) 2:h (2 players)
Hero bets $0.50, BU calls $0.50.

River: ($1.6) 9:c (2 players)
Hero checks, BU bets $9.84, Hero folds, BU gets uncalled bet back.

Final Pot: $1.6.