Hi Frangipani
How very special to be a grandma! Makes the hard survival stuff all worthwhile! I am a breast cancer survivor but haven't needed reconstruction. However a friend of mine who had reconstruction 10 years ago at the age of 45, tells me that it was the best decision she made (she too had double mastec for genetic reasons) She said that at the time she didn't think reconstruction was important, but went ahead with it as she was encouraged to by her friend, a surgeon, and she later realised that it helped her feel "feminine" and helped her adapt to life after breast cancer. Only one person's opinion but I hope it's helpful to you. Guess we're all different, and you'll know what's right for you. All the best with your journey.
Zen