DCIS with strong family history

Hi All, I’ve had diagnosis of DCIS grade 1 in left breast, still awaiting diagnosis of mass in right breast as my MRI films have been sent of to specialist in London for an opinion. I have very strong family history of B C, both my mother and sister had bilateral BC, my maternal grandmother and great aunt also had BC. My feeling is that I want double mastectomy regardless of diagnosis of right breast. Am I likely to get it?