Kimberly Stewart and Benicio del Toro apparently did the nasty because she's knocked up and he's the daddy.  They aren't together, and have no plans of being a couple.  But, he "is supportive and both are very excited" about the upcoming arrival, a source tells People.

‘Robin Hood’ Premieres @ The Cannes Film Festival

You can't help but wonder if they just had a one night stand?  Were they just friends with benefits?  What's the back story?  Will it come out during this pregnancy?  This sounds like a juicy one.  What do you think the real story is?

Photo: WENN