"HIMYM": Who is the Father of Robin's Baby?

 minor spoilers

Who's the father of Robin's baby? And what's the bad thing that's happening to her that "How I Met Your Mother" co-creator Craig Thomas dropped hints about? I know the answer to at least one of those questions, and I'll speculate on the other.

Craig Thomas (co-creator of "HIMYM") has dropped hints about the episode, including the fact that Robin gets bad news. I'm concerned that she'll have a miscarriage, and think it's a possibility that the writers might have decided to go that direction because: a) Lily is also trying to have a baby, and having two characters pregnant at the same time can really complicate story-lines b) "HIMYM" seems to be way more of a drama-comedy recently (the horrendous Barney/Nora break-up, Barney/Robin will-they-won't they, no she'll choose Kevin scenario comes to mind) then a true comedy. But I really, truly hope that that doesn't happen.

Other 'bad things' that could happen? Robin clearly has a lot of unresolved issues with her father, so perhaps she has to deal with him having an illness, or even dying (although that seems unlikely since we already dealt with the death of a parent last season). Or, Kevin could break-up with Robin right when she's about to tell him she's pregnant (or worse, after she tells him she's pregnant). Or, Barney could say something horrible to Robin about her pregnancy (this seems highly unlikely, but you never know). Craig Thomas has promised that the show won't deal with abortion (at least in this particular situation), so at least we know it's not going that route.

The episode will pick-up exactly where the last episode left off, and the father of the baby will be revealed very early. Want to know who it is? Watch the clip:

if you watch this it's a major spoiler