Too bad, you'll get it anyway ;)
Okay, so let's start with the key thing: Most of the times, girls were married off at age 12-15, generally to cement alliances. They were expected to know how to run a household.
This was her property, and her children's inheritence.
This meant that she was the one keeping track of what was in stock, and everything went through her.
She needed at least one witness, and to be proper she should state twice that she divorced him: once at the door, once at the marriage bed.
Most cases of divorce there only has the woman saying it once. ... occasionally after stabbing her soon-ex.
The sister does not want, but her husband overrules her.
So she stabs Gisli's killer and divorces her husband on the spot.
While they could own property, they were not fully free.
Even when houses were burned down, the tradition was to allow the women and children to escape, if they wanted to.
There are, however, two oddly-shaped pieces of that puzzle:
1: Contemporary (English) source suggest that Vikings were less prone to rape during raids than others
2: While raping a thrall woman carried less punishment than a free woman, it was punished
A woman was expected to bring her grievances to the closest male relative, to let him avenge her, rather than to avenge the wrongs directly.
This is supported by women being in charge when the men were off raiding.
First, even unfree women had some measure of protection, though a thrall would only be repaid for you hitting her if you slapped her hat off to show her hair.
The money went to her, not to her owner (if thrall) or husband (if married) or father (if unmarried)
But even as he works his way up to her thigh she can say no, and he had to stop
I'm working on viking-era stories!
I've mentioned sexual assault. It was up to the assailant to prove that he didn't rape the person.
If she was raped without witnesses, but someone heard her cries? Witness.
If she doesn't know his name, but sees him later, he has to bring 12 witnesses to vouch that he was not there.
But if she became pregnant and can bring forth 12 witnesses, he's still guilty.