Yup, indeed "just a MS"... but the stripe and the pattern looks so weird I doubted Anyway it looks like a kind of stripe-thingy... And it has the weirdest collar-like black spot on the neck.
The sibling is just about to hatch too, it wiggles in the egg!
*Update*
I've made a better photo- this one shows a stripe on her back as well as the black collar around the neck I really wonder what she will be like after she sheds a couple of times...