She claimed that her husband's leg had accidentally touched the actor.
Sachdev, a resident of suburban Chandivli, was arrested last evening after a huge public outcry over the incident prompted the Maharashtra State Commission for Women to seek an inquiry into the "shameful" incident.
He was booked for assault or criminal force to woman with intent to outrage her modesty, and relevant sections of the Protection of Children from Sexual Offences Act (POCSO) as the actor is a minor.
Divya Sachdev claimed her husband had apologised to the actor before deboarding at the Mumbai airport "to which she said it was okay".
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"My husband is a family man. He is innocent. He was mentally exhausted as he was returning after attending the funeral of his uncle (in Delhi).
"He was taking rest and was fast asleep when his leg accidentally touched the girl. Vikas apologised to the actor before getting out of the plane to which she said it was okay," she claimed.
In the video, which Wasim recorded immediately after deboarding the flight, the 17-year-old actor broke down several times.
"So, I was in a flight travelling from Delhi to Mumbai today and right behind me one middle-aged man who made my two-hour journey miserable. I tried to record it on phone to understand it better because the cabin lights were dimmed, I failed to get it..." she said.
"The lights were dimmed, so it was even worse. It continued for another five to ten minutes and then I was sure of it. He kept nudging my shoulder and continued to move his foot up and down my back and neck," the Kashmiri teen, who shot to fame for her stellar performance in Aamir Khan's blockbuster "Dangal", said in the video.
"No one will help us if we don't decide to help ourselves. And this is the worst thing," she added.
When asked if any official from the airlines got in touch with them, Divya Sachdev said her husband had told the cabin crew not to disturb him for anything during the flight as he wanted to take rest.
She also alleged that the police lied about the timing of her husband's arrest.
The woman, however, claimed that her husband was actually picked up from their residence (in Chandivali) at around 12:30 pm yesterday and that she can produce the CCTV footage from the building cameras to prove her claim.
"We had no clue when police reached our home to arrest him. Till 2:30 pm (yesterday), we were not told why he was brought to the police station. Till 2.30-3 pm, we are not told why he was arrested or why he was brought to the police station. Later, we were told that he was brought to the police station in connection with a molestation case," she claimed.
Vikas Sachdev currently works as a regional manager at Sun Broadcast here.
Air Vistara had said that it had "zero tolerance towards such behaviour" and was looking into the complaint.
Terming the incident as "shameful", Maharashtra State Commission for Women's (MSCW) chairperson Vijaya Rahatkar had said they would seek a detailed inquiry into it from the Directorate General of Civil Aviation (DGCA).