could fondant suck moisture out of a cake or was it just a bad cake recipe? (it was new) even when you put a fondant covered cake in the fridge (sliced open) its still not suppose to take moisture from the cake right? p.s my mom put it in the fridge,i told her she didnt have to 
Fondant does the opposite, it holds moisture in .
How long was it in the fridge, overnight or for a few days?
A fridge will dry your cake out but not overnight and covered in fondant ,it had to be the new recipe.
Either try it again or find a new one. Sorry about that.
..even when you put a fondant covered cake in the fridge (sliced open) its still not suppose to take moisture from the cake right?
Not covering a sliced cake is just the same as not covering bread and putting it in the 'fridge - not a good idea. 
But you can cut off the exposed portions, and the remainder should be fine. (Just be sure to wrap it well - if there's a perishable filling. Otherwise, just covered on the counter is fine.)
HTH
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