When fishy players wake up and raise you on the turn or river, or take away the lead in betting on the turn or river, or start betting big on the turn or river, one pair is often beat. It's different on the flop when they will sometimes rage-shove any pair, but not on the turn or river.

Here though I think the bet-small-when-the-Q-comes and then bet-big-on-river could be AQ. I don't think this is QJ. I think they'd bet smaller with that. So here I'd say it's most likely KJ or AQ. Taking that range as representative you are good 12/20 or 60% of the time. So if AQ is in their range then it's a call.