[ajk3e]

I think you are best here most of the time. MP has to bet here with AAxx or other made hand as it is a draw-heavy board. CO would bet a made hand as well given that MP has checked. My only concern would be UTG, b/c UTG will check both made and missed hands here given the preflop action (c/r made hands, c/f missed). I tend to bet at this (usually pot) and try to take it down, but I think checking is also fine as your current hand isn't terribly strong and lower flushes may pay off if the flush comes.