Kapoor has famously vetoed being intimate on screen with anyone except her real-life fiancé Saif Ali Khan.
"All I can say is that Kareena is an extremely professional and committed actress," a source told Mumbai Mirror.
"A suburban five-star will be booked for the sequence, in which Kareena starts off with smoking and drinking and ends up in bed with Rampal."
The newspaper claims that there will only be three members of crew assisting director Madhur Bhandarkar for the shoot.
Kapoor recently said that she does not suffer from jealousy when seeing her boyfriend on screen with other actresses.
In January, she received the 'Most Profitable Actress' prize at the ETC Bollywood Business awards for having the biggest box office successes of last year.