What mean teg cheating in your game? Mc have sex with other men wife/gf or mc get cuck?
NO NTR man Reverse NTR is optional. no one is cheating MC mc cucking other guys.
So Melly or Blanca will not be LIs, because they are fucking other guys?
Blanca is reverse NTR material, you'll take Blanca from Kevin. Melly is side character yeah.