Possibly. On page 572, the first panel shows clouds and light as she talks about heaven. I think that might not be a representation of her afterlife, but an actual path she can walk.
Also I just want to say that Onni stealing Reynir's cake is the cutest thing ever. I get the feeling Reynir would politely pretend nothing was happening if he noticed.
"Uh, Onni?"
*munch, munch* "What?"
"Uhh... never mind."
Okay, then the church woman finding her way to heaven probably won't be much of a problem.
And yes, Onni stealing Reynir's cake is the cutest. I also think that Reynir wouldn't be mad at him or anything. He's probably happy Onni is enjoying the cake. However, is Reynir as polite as we all think? He did say "This soup tastes gross" out loud, he could have thought it.
(Mikkel also never got mad at Lalli for stealing his cookies, although he must have noticed.)
Also, Onni eats pie with a spoon... why would one eat pie with a spoon... I'd use a small fork.
I hope that in the SSSSverse, christianity is true (next to pagan and the norse gods). Because otherwise, the souls and the church lady might have a problem...