Was President Buhari checking to see if Aisha voted for him?

There is a viral video on the internet that seems to suggest President Muhammadu Buhari checked out the ballot paper of his wife, Aisha.
Mischievous commentators are saying he was checking out to see if his wife voted for him.
Others say he was merely making sure, as a good husband, his wife did the right thing.
See the Channels TV capture of the incident: