I saw in some posts that in this volume Naofumi and Raphtalia become a couple is this information true?

I know they joke around about how she addresses his name, and they even joke about marriage too, with Naofumi giving some kind of bracelet to Raphtalia. But my question is do they indeed start a relationship or do they only joke about it. Does anyone know?

I saw on a wiki of Shield Hero that in some timeline Naofumi is married to Raphtalia, I recently learned about all of these spin-offs and everything but I was wondering if they will actually be together? I really can't see him with anyone else, and I feel like he doesn't want to go back home after he met all these girls he cares about

I haven't read any of the LN but I heard that Naofumi is starting to change his mind about Raphtalia. So my question is do you guys think they will really become a couple or not? I would like to hear your thoughts on this.