Is it haram to cheat and if so what is the punishment? If there was a condition in the Muttah contract that the male cannot take another partner and he breaks the contract and does, what’s the ruling/punishment? As well if he forced the girl to change her mahr and kept prolonging giving her it?
Yes cheating is not permissible and it’s a sin. If the contract is broken then the wife has the right to annul the contact. Forcing change of mehr is not permissible