99 vs tight raiser - theoretical question

[TheOffice]

MP is like 25/11/1.50 and opens
I hold 99 and 3-bet CO, others fold.

Flop QJ2 r - Check, I bet, call.

Turn 7 completing r - Check, I bet, c/r, I fold.

Easy enough. I fold to a river bet also if he's only calling.

But what's up with my turn continuation. I don't think it's valueable vs. his range. I never fold a better hand, there might be a semi- bluff, see myself behind a lot even on the flop, etc.

Would it be also OK to give a free card on the turn, calling a bet on blank on the river, folding to another broadway? Or is the line given above the "standard" and one shouldn't derivate from it.

[Leader]

This guy isn't the type to semi-bluff the turn. Plus his range doesn't have and big draws in it. He also isn't the type to auto-bet the river with nothing. So you need to bet the turn and protect your 9's from AK/AT.