Im not saying that calling the turn was the right move;however, if youve concluded that your Queens are ahead by calling the raise on the turn (the 'desperation all-in bet was the right read), I think you should make the call on the river. The pot has over 200 and is laying 10:1. Even if UTG has a flush 8 out of ten times, this call will still be profitable in the long run;therefore, there is not much use folding on the last bet after playing them this far.