I've wondered if Aslaug will die in childbirth and if that comment was foreshadowing.
I watched the episode again over the weekend, with DF - he fell asleep the first time, and now I think King Horik never had any intention of helping Jarl Borg escape. I do think he still plans to betray Ragnar though. It looks like he had plenty of time to help him escape if he was going to. I mean Floki and Helga had a wedding and there seemed to be a significant amount of time that had passed in between imprisoning Jarl Borg and "Earl Ingstad" showing up...Helga was showing at that last dinner and was newly pregnant at the beginning of the episode.
I watched the episode again over the weekend, with DF - he fell asleep the first time, and now I think King Horik never had any intention of helping Jarl Borg escape. I do think he still plans to betray Ragnar though. It looks like he had plenty of time to help him escape if he was going to. I mean Floki and Helga had a wedding and there seemed to be a significant amount of time that had passed in between imprisoning Jarl Borg and "Earl Ingstad" showing up...Helga was showing at that last dinner and was newly pregnant at the beginning of the episode.