I would check this flop multi way especially with to weak passive players to act. If your read on the CO is he is weak tight i doubt he'll bet out at this multiway unless he called with A rag or w/e. Then the button likes to slowplay if he has a 5 he might check behind also might even check an ace but not likely. If you get a free card and its a club id feel happy getting it in against a 23bb or 51bb stack with a 9high flush. So i'd start value betting. But if you lead this board and get shoved on by the shortie it's gonna suck. So i'd check.