nut flush with pair on board

[RISEorFall 0]

Preflop: RISE is SB with [9d], [Ad]. 1 fold, CO calls, Button calls, RISE completes, BB checks.Flop: (6 SB) [Kd], [8d], [Ks] (6 players)RISE checks, BB checks, UTG+1 bets, CO folds, Button calls, RISE calls, BB folds, UTG+1 calls.Turn: (7 BB) [Jd] (4 players)RISE checks, UTG+1 checks, MP1 bets, Button calls, RISE calls.River: (19 BB) [5s] (3 players)RISE checks, MP1 bets, Button calls, RISE calls.Final Pot: 22 BBShould I raise the river? If he was paying any attention (which I might be giving him too much credit for) He would've seen me check/3-bet, and still capped.