Mushoku Tensei: Jobless Reincarnation

[Kraco]

So after this, instead of waiting a week now, he literally pressed the issue with Roxy about one hour later (that's quite likely at most the time he waited) and said:
"Oh and btw, this is going to be my 2nd wive, I bedded her after I felt down and she really helped me there"
(making it sound bland to point to show how absurd the topic/mood switched)

There was almost no reason to declare that immeadiatly, Roxy could've stayed in the house for basically any reason. They are now waiting until the child is born anyway, so why not declare it after something "good" happened to dampen the blow.
In my opinion this was just Rudeus being a little stupid/jumping the gun.

In front of the kids?
Hm, I still feel like this could've been something he could discuss with Sylphie alone and then with Aisha and Norn later after they calmed down, although Aisha would most likely have found out herself anyway.
Let them mourn their father before you bombard them with even more "problems".

Norn and Aisha were just the peanut gallery there. Rudeus was talking to Sylphie, asking for her permission. That obviously could not wait. Rudeus brought Roxy with her, with certain implications, which would be far worse if he said nothing for months (he would have been hiding the immoral act for months). Worse for both Sylphie and Roxy. Norn and Aisha didn't really count for much in this concrete issue. It's anyone's guess why they were there. Perhaps because Rudeus didn't think it through? He's no wise old man. It could be he simply thought it would allow him to get them informed as well, without needing to do the declaration for a second time. Somehow Norn then stole the center stage. I doubt Rudeus wanted to make Roxy stand through it, when Norn attacked her like a public prosecutor.

Either way she doesn't seem that devouted to me, considering how fast she dropped this issue (which is probably one of the "main features" of that belief), so it's not like her belief is the reason why she hates the idea.

She dropped it because Sylphie accepted it. What else could she have done at that point? Her religious beliefs weren't the only reason. Other plausible reasons have been mentioned, such as the suffering Paul's infidelity caused her back in the Millis capital. But do the other reasons matter either when Sylphie accepted it?

Maaaaan, I can't wait for season 3, there is still so much stuff going on in that series and world that I want to know more of.
The simple fact that this time around Rudeus didn't listen to Human god for the first time makes me wonder what will happen the next time they meet.

Hitogami carries the title of a god, so I doubt he holds a personal grudge. He just ought to try harder to convince Rudeus the next time. In the end, we don't even know what Hitogami wants. All this stuff could be of zero consequence for him. His real goal might be decades in the future, and it doesn't matter how Rudeus gets there, just that he is there in a shape suitable for Hitogami.