Reporting rental income

Dear expert, 

I own the flat, but my wife receives rental income as cash which she uses for her expenses. Can she report this rental income in her returns ? The tenant qotes her pan card in his office to receive HRA benefits. 

Important to mention that though I do not receive the rent, the flat belongs to me, and I do the lease agreement from time to time depending on my availability in town.

Kindly advice can she report this rental income in her returns ?