Actress Kareena Kapoor and her boyfriend actor Saif Ali Khan have flown back to Switzerland after attending Saif’s father, Mansoor Ali Khan Pataudi’s birthday on January 5.

“The hotel in Switzerland is booked till January 14. So Bebo and Saif will be there till the 14th after which they will come back, unless theydecide to extend their holiday or somewhere else,” says a source.

Sources close to the couple also say that the duo will be immersed in work when they come back because of the back-to-back shooting schedules that they have already lined-up.

The couple had taken a break from their holiday and had apparently flown all the way from Switzerland just to attend senior Khan’s birthday.

Talking about the party, a source says that the entire Pataudi khandaan trooped in from wherever they were to attend the special celebration that was mainly organised by Saif’s sister Sabah and mom Sharmila Tagore.

“The entire Khan family which included Sharmila Tagore, Soha, Sabah, Saif and Kareena took part in the afternoon feast and then there was another round of celebrations that went on till late into the evening,” says the source.

However, Saif’s children who were also supposed to attend the party couldn’t make it because they were in Singapore. But it is learnt that they called to wish their grandfather, the source adds.