Simplify the following text for a Grade 6 native English-speaking person.
Original: When Chapera lost the next immunity challenge , Rob whispered a deal to Lex to save Amber , promising that he will make it up to him later in the game .
Simplified: When Chapera lost the next immunity challenge , Rob M. whispered a deal to Lex to save Amber , promising that he will make it up to him later in the game .