When your mother is in an mentaly abusive relationship?

Lives, in Italy where you are staying for the summer, and have the money bye a plane ticket back to the states, but not the 1500 extra to ship everything (her life and work) what should you do? the guy just called about something (business related) and starting yelling right off the bat. she hung up, he called back, yelled some more and she hung up again. he called back the third time and I answered “can we talk nice here, Its very simple, you ask nicely for things, and they get done” He hung up on that one, guess he didn’t like that response, It is the first time I have spoke my mind in a month and a half. Kinda stuck here, What should we (I) do about it? Keep myself out of business that’s not mine, or have a talk with the guy about how wonderful my mom is and why he should treat her better so he doesn’t die alone?