(Cover) - EN Showbiz - Kimberly Stewart was hoping shed live happily ever after with Benicio del Toro, according to sources.

The 31-year-old model announced she is expecting a baby with the Hollywood star last week. The news of Kimberlys pregnancy came as a surprise as her liaison with the hunk has never been made public.

The pair who are not currently dating have vowed to remain on good terms for the sake of their baby but sources close to Kimberly have revealed that the blonde beauty was hoping for something more and is secretly upset that Benicio isnt looking for a family unit.

Kim was hoping theyd live happily ever after, a source told Closer magazine. Kim knew Benicio just considered her a fling. Then when she ended up pregnant , Benicio said he wouldnt marry her and didnt want a relationship but hed support the baby.

Kimberly - the daughter of Scottish rocker Rod Stewart - is currently single but has most recently been linked to British actors Rhys Ifans and Jude Law. In 2005, she was engaged to Laguna Beach star Talan Torriero.

Sources close to Rod, 66, say hes worried about how Kimberly will cope with the unexpected pregnancy. Despite his concerns, the rocker is reportedly rallying around his daughter to help in whatever way possible.

He isnt exactly thrilled Kim is having a baby without being in a relationship. He will do whatever he can to help Kim, the source explained.

Benicio, 44, has previously been linked to a host of beauties including Scarlett Johansson, Alicia Silverstone and Minnie Driver.

He recently told an American website that he is too busy for a girlfriend. (C) Cover Media