That's fascinating, and squick-worthy, all at the same time.
The article didn't say that her offspring were haming her in any way, just eating the extra skin. It seems beneficial for them both; Babies get bigger, and Mum gets rid of the extra skin she grew during the reproductive process.
Did anyone else watch the video and go 'aww!' when they showed their little teeths? 
I checked Wikipedia to see if maybe they're related to slow worms, but found no connection. I did happen across this bit of info:
Quote:
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Originally Posted by Wikipedia
75% of the species are viviparous, meaning that they give birth to already developed offspring. The fetus is fed inside the female with special cells of the oviduct, which are eaten by the fetus with special scraping teeth.
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So the ones that don't eat the mother's skin.. eat her insides instead!
