The actress says she was aware that she had to shoot for certain bold scenes for the upcoming erotic-thriller, which gave her many sleepless nights.
When asked if there was any apprehension, Sana told reporters,"Of course there was. Even when I signedthe film I knew there will be some hot scenes which were making me very nervous and giving me some sleepless nights."
The Vishal Pandya-directed film also stars Sharman Joshi, TV actor Gurmeet Choudhary, Rajneesh Duggal and the "Jai Ho" actress credited the team for making the scenes comfortable to shoot.
"When we started the shoot and I got to know one day before, that tomorrow we will be doing it, obviously I was very nervous. It's very important that the people you're working with make you comfortable.
"I was comfortable eventually, it happened. It is very important that these scenes happen rightly. Especially, we have done all these scenes in one take," she added.
Sana plays a lawyer in the movie.
The actress said there is a very thin line between vulgarity and sensuality and she is proud that she has never looked this good on screen.
"My DOP (director of photography) plays a very important role. He is the one who is going to film me. I don't know the frame he is going to set, how am I going to look.
"It's a very thin line between looking sensual and vulgar. I can proudly say I've never looked this pretty on screen," she added.
The actress was speaking at the trailer launch of "Wajah Tum Ho".
Asked if superstar Salman Khan, whom she worked with in "Jai Ho" has seen the trailer, she said, "I am sure like everyone else is seeing it, he will also. He didn't wish me yet. But Sohail (Khan) did. I am sure once he sees the trailer he will too."
The film is scheduled to release on December 2.