What is your exact problem? Do you wish both of you should get tax exemption under Sec. 80C for same amount? Go ahead. Inquiry if any, from Tax Authority arises in future, face it.
Now, if your query is because your spouse has paid the Tuition Fees for your children but not falling under the taxable limit and you feel that you are just missing the opportunity to claim the tax benefit thru your income. In that case transfer the full amount of Tuition Fees to your spouse account on or before 31st March, 2018 and claim the benefit. You can make this transaction by cash withdrawal also and obtain her signature for money receipt, which will be genuine.
Suresh