Like you guys said maybe it's about money... But aiman seems a very principled person... Even though she needs money for home, getting someone falsely arrested for attempted assault and murder doesn't seem like her.. Esp a person who before this was kind to her and even saved her in the pool... Plus that's not really a "heroineish" thing to do by ptv standards
Rahim broke his promise to protect her from Shehroz, didn't help her, left her to die, and instead tried to protect the culprit. And now she'll think that he has leaked pictures to defame her, so she is accusing Rahim, as she thinks he is the mastermind or responsible for all that happened to her. She isn't doing this for money but because she has misunderstood him as a bad person.