Comedian Marlon Wayans GOT BUSTED . . . Trying To CHEAT ON HIS WIFE . . .With Some MUSCULAR Latina INSTA-THOTTIE!! (PICS)

Marlon Wayans got caught with his hand in the cookie jar. Marlon - who we're told recently WED his longtime GF has some explaining to do.

You see, he was creeping in the DMs of South American fitness model Palloma Lima - and she put him on BLAST.

Check out what she looks like - and Marlon's VERY WEAK game . . .