O/8 river play

[Bullajami]

$50 NL O/8. Hero has $22.

On the bb with , hero sees the flop with 3 other limpers.

($2)

sb checks, hero bets $2, UTG+1 calls, btn fold, sb folds

($6)

hero bets $6, UTG1 calls

($18 )

Hero has $13.50 behind, UTG+1 has that covered. Check or bet? If he was chasing the low or the flush he has an A, does he also have a T?

[clabbers]

if opponent doesn't have two spades, he's more likely to have T9 than AT. Matter of styles here. I'm willing to check this down with a slight +ev belief, but if opponent will never permit that, lets push.