Wanna know the secret of Ajay Devgan's new and improved slim look?

It's Kajol.

The pretty lady is terrible when it comes to cooking. Just to corroborate our claim Tanisha, Kajol's younger sis, says, "She is an atrocious cook. Given a chance, she can even burn water too. However when making salads, she isn't that bad."

So that explains, why poor Ajay is losing weight while this dusky beauty freaks outs on pizzas and French-fries.

But the versatile actor can sure expect some sunny days ahead of him as help is present at home itself. His mother is a very good cook and so are Kajol's mom and her cousin Mayuri.

According to Tanisha, "She has improved now. Since she is conscious of not being a good cook, she takes a lot of effort."

In the end all we can say is that playing a perfect bride on screen isn't much help in real life after all.