I would like to recruit Annekke the hotwife as my companion but I don't get this option... any idea if there is a prerequisite quest before she gives me a quest? I did both delivery quests for her daughter and husband but she still doesn't have a quest for me

Anneke Nordstrum?

That might be a "radiant story" quest, maybe you already completed it for somebody else?

Wouldnt her husband object to you marrying her?
Maybe thats why

edit: Oh companion, sorry I misread.
I have no idea really how to get her as companion.

Yup, its definately a radiant "kill some bandits" quest.
But does that mean it's only given out once?

I read on the internet and a lot of people has her as companion after doing a kill-bandit-camp quest for her, but weirdly she has no quest for me.