Mistres or Mistress: How To spell?
The word Mistres is misspelled against Mistress, a noun meaning "A married woman; a wife."
Mistress has double 'ss' in the end mispronounced as 's'Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  mistre-s  Correct Spelling:  mistre-ss 
Find more wrongly spelled words of Mistress to spell it well.