2-4 KK up against probable aces

[ahnuld]

2-4 on Prima. I (450) have KK in BB. It's folded around to sb (600), who I have found to be a generally tight player. He makes it 14 to go. He would do this with only a hand he would normally play. I reraise him to 38. He immediatly makes it 80 to go. It is possible he would play QQ-JJ this way, but now it is almost 90% he has AA or KK.

I call. Flop comes QT3 with a backdoor flush draw for me. 160 in pot. He bets 50. Any line other than fold. Does anyone like raising him right here, or calling him down?