I think this is completely reasonable
also, hands like AJ are possible, turned flush draws, turned oesds, weirdly played flopped sets
that's why I think turn is a call he could have random shit
but he's pretty determined about it on the river so I'd take a look at his PF stats for the first 20 hands and if he looks aggressive PF I'd tend to look him up more
but seeing as this is NL10 folding is not a huge leak, people generally don't continue bluffing for two streets because they are huge pussies