Sir,
As defined in Sec 80DD, to claim the deduction :
1. A medical certificate is mandatory when one wishes to claim the deduction with respect to the mentioned disabilities from any Government Hospital. The document should certify the disability of the dependant and the person they are dependant on. The certificate needs to be renewed periodically.
From the facts of your cases it does not seems that she is suffering from such kind of disabilities. I dont think you can claim the deduction.