Yes. But the family doesn't lose it. She can count the money you paid, when claiming the educational credit on her own joint return.
A related question is: Can you still claim her as a dependent. For an answer to that question, see:
https://ttlc.intuit.com/community/taxes/discussion/can-i-claim-my-daughter-who-got-married-on-decemb...
If you are able to claim her as a dependent, then you can claim the educational credit.
