Scenario based Income Tax query

I am Male - 32 yrs have deposited 40 lakh over a span of 5 years in a joint account bearing my wife's name as first holder and mine name as second holder . The interest accumulated over the years , TDS has been cut under my Wife's name and her PAN card.

Now I am buying a flat with 40 lakhs in my name . She is transferring the amount to my account and I will buy a house under my name

Question in future will I have problem showing the source of income ? or this is a common approach ? What I am doing is it legit or missing something ?