32 Yo One Child Large Breast That Have Sagged and Deflated with my Love of Exercise - Scottsdale, AZ

I've been researching getting a possible lift and augmentation for over a year. I'm a 32dd but with a very padded super uplifting bra. I've always had size D breasts and always had comments on how lucky I was. What people don't understand is that most naturally large breasts are not the full round breasts people think of. Two years ago I began to exercise alot, and I love it. The problem is as my body has tightened up my breasts have done the opposite. So after a year researching brands and procedures, then two months reviewing doctors and two consults I have chosen Dr. Spies in Scottsdale. I have my pre op in three weeks surgery in five. I've decided on sientra round base textured. Size wise I want them as big as he can safely go after doing the lift. I'm really excited!

I've taken some pictures, I'm heavily tattooed so ignore the shirt /color blocking on my skin. One week to my pre op! So excited!

So I'm not sure what I should tell my son. He's 6 and very smart. My ex-husband says I shouldn't tell him anything because it's a private area and he's too young. But there's no way he won't notice and he likes to lay with me at bed time and give me hugs. Anyone have any advice?