HU PLO8. is this a river bluff?

[mosta]

two players. 2-4. we both have about a buy-in. I raise to $10 with 9c Th Js Kc. he calls.

Ad Qs 8s. I like this pretty well and lead the pot. he calls.

Kh. okay, I'm out of position. I go for the money while I know I'm still ahead. he calls my pot bet.

Qc. great. if no money had gone in on the turn, I'd be happy to call. but now we've got three pot bets in there, almost half a buy-in. the reflex move is to fold to the paired board. but did he really smooth call two times with a set or two pair?