That isn't a "ripple effect" caused by implant problems.
You are pointing out natural skin folds, which is quite
expected given the weight of Petra's DirtyPillows.
Implants are encapsulated in scar tissue. They don't
flatten out and slide into a babe's armpits when she
lays on her back. The amount they protrude while she's
standing is how much they stick up while she's laying
on her back. Can we agree on this?
The recumbent-sexy-arched-back-pose is pretty much
standard fare for models with implants. But there are
very few photos of Petra on her back while she's not
cradling her tits. I've
never seen a photo of Petra on
her back with her arms above her head. Wanna guess why?
Cause her Pillows would probably touch the ground. While I
find that extremely arousing, apparently it makes her
uncomforable so she rarely (if ever) allows that pose.
The image I've attached is the only two I have of Petra
on her back. Implants just don't flatten out like that.
She's obviously cradling her boobs in the right image
(which is very early Petra). I suspect her arms are also
supporting a bit in the left image, although we really
can't tell how much.

Arggh! The last time an infidel dared question Her Perfection
I posted a screen cap from
Centerfold Fantasies showing
Petra is on her back (all oiled up and...ooooh). Unfortunately,
I recently deleted the image from my drive and the damn search
function won't allow me to go back that far without tons of
hassle. So I'll dig out the damn VCR and cap the images and
repost them again <grumble-grouse-bitch-moan>.
And while I'm at it, I'll also grab a short video clip and
see if someone (*cough* Sheber *cough*) will host it. Once
you see Petra in motion, any doubts will be dispelled.
Hold on a sec'...