Is it permissible for an 18-year-old Sayed to enter into a Mutah with a Christian or Jewish girl who is not a virgin due to prior non-marital relationships?
If she was never married before, she still needs the permission of her father or paternal grand father. If her father or paternal grand father disagree for invalid reason, then has the right to decide for herself. If you have a Muslim wife, you need her permission to have a Mut’ah marriage with Christian or Jewish female.
Wassalam.