Actually it's the other way around. If you claim her as a dependent then she can not claim any dependents on her return. Sounds like you might be able to claim her. Then on her return she has to check the box that says she can be claimed on someone else's return.
Who can I claim as a dependent?
https://ttlc.intuit.com/community/credits-and-deductions/help/who-can-i-claim-as-my-dependent/00/267...
