Please help . one of my girlfreinds is getting married and there are problems?

she has been with this man for 11 years but he is controlling her . she said he goes through her phone calls her Friends and ask her all the time why is she loosing weight or why wear make up to work. anyone have ant advise i can give her they are scheduled to get married next month. i told her i would rethink the marring part because she doesn't seem happy