IMHO cap flop and call river.
On the flop UTG could be reraising with Kh xh. On the river you seem to beat by either a flush or KQ.

Edit: Of course raise preflop 99% of the time. You can maybe limp UTG on a loose table and then reraise.
Why is it important? You want to let others pay for calling with worse cards than yours. You don't want 9 limpers and a coordinated board.