I fold this preflop. not real comftorable with it even when you hit your set. First as you say it is a flush board. Second, a higher set pretty much has you drawing dead (1 out). That being said, i fold this preflop but since I've stayed and set myself up for a difficult decision, i go broke here? No i fold? no go broke? no, fold? Tough choice, fold preflop. Really situational based on reads. Can't fault you for checking the flop, but maybe a probe bet would have done the trick there. I think i fold the river. Maybe.