I have reached a point in my story in which the characters, who are in a sort of gang, will have to turn against each other. The specifics of it are not important; what is, is that capturing the main character presents an opportunity for them to gain more power, and they gather to capture the MC and bring them in for their prize. However, I am having trouble figuring out if the MC should anticipate this betrayal at some point, or for it to come as a complete surprise to them and thus the reader, making it a better twist.
Note that before this the gang had a large period of mistrust and absence where they were almost starved with siege warfare, so they are now pretty much separated and desperate for power, which is why I am hesitant on just playing the MC off as clueless.
So, what do you think I should do?