Kareena Kapoor's lovemaking scene with Saif Ali Khan in Kurbaan and the film's bold poster showing them half naked are the talk of the town. Kareena apparently had no qualms about doing the scene. However, after watching the film's trial show at Yash Raj Studios, Kareena has got a bit nervous about her mother Babita's reaction to the steam scene. Therefore, Kareena put in a …