Originally Posted by
a1chemi
Where in the strip has it ever implied at all that she would go to Hel for leaving her husband?
The specific deal is that those dwarves who die with honor go to Thor. An honorable death is a death in battle, based on the same comic where Durkon relates these rules, and every comic where they are discussed (Eugene wants all the dwarves to charge a dragon or split up and squeeze in a civil war).
As an adventurer she is almost guaranteed to die in battle. If she goes back and is murdered for betraying her family she's quite certain to go to Hel.