Quote oltllover: There are so many problems with this scenario. first, there have been too many babies lately on the show(JMO) and second the fact that Robin is still alive means that technically/legally Patrick is still married(I'm pretty sure) so to marry Sabrina he would have to divorce Robin and lastly marrying sabrina to give her baby a family takes away from the fact that Emma needs a family too and its 2013 being born out of wedlock is a bit old school if he cared about that sort of thing he would have married Britt.
In legal speak, Patrick is not legally married to Robin anymore. She was pronounced dead, there was a body that her own father identified as her and a death certificate issued. So, right now, Patrick is a widower who is free to move on with his life and remarry without complications if he chooses to. I work with lawyers and asked them about this scenario and that is what it would be in the "real" world. It has been more than 12 months since Robin was pronounced dead and there was a body, so he does not have to wait like he would if there was no body. Now when she comes back, there would, in the "real" world, be some legal things that would need to be resolved.
Now all of that being said, this is a soap and they (the writers) can twist this however they choose to for the drama and storyline and ratings.