Please Don’t Eat Me

“It’s five billion marukas, it’s a bargain.”
“Sure enough, it’s a bargain.” ‘Ertha’, who is destined to be eaten alive by the male protagonist bargained marriage with him to change fate! Ertha was reincarnated into a rated 19+ fantasy novel. As the original story goes, Ertha, was eaten alive by the protagonist Jahid, but I can’t die like that because I have my little brothers. I offered a deal to the main character who’d eat me up. I’m the target of the proposal, 5 billion marukas!
All I have to do now is run away before the main character gets a chance to eat me. Can I, Ertha, escape from the hands of Jahid, the greatest wizard in the kingdom?