I think this c/r tells us that this guy has a hand, and it is so good that he figures he wants action OOP by hoping one of you guys takes a stab. he raised $5 more into a $15 pot. My guess is that if you hit your flush your bets are going to get paid, well at least on the turn, so youve got the implied odds to just make the call here. If your straight comes in, you also play it like the nuts.