@Suzi_S61 As @Sister says, testing can be completely subsidised if you meet certain criteria. Otherwise it can be very expensive. The testing I'm doing is not for the main players (BRCA1 & BRCA2 and a handful of others), but for a gene mutation. My sister had the testing for main ones before she died and none were present. The test I'm doing now costs $400, plus the cost of the consultation fee.
The process takes four to five weeks.
I informed my new oncologist I was doing the test when I met her for the first time a couple of weeks ago. She knows the geneticist and said he was good. I'm doing this testing for my remaining sister, and the onc didn't express any concerns. If it comes back positive I will certainly make an appointment to discuss it with her.
Generally speaking I don't think one family member with breast cancer raises any flags. It's just so common. However I would have thought your mother's age at diagnosis would have warranted discussion. Ask your oncologist next time you see him/her and let us know how you get on. I don't think you'd be the only one in this situation. K