Is it weird that a woman would go sleep with her mother rather than her husband?

So whenever we go visit her mother, she will leave me in a guest room, while she sleeps in the same bed as her mother. I don't really say much, as I understand that she hasn't seen her mother in a year, but still isn't this a bit unusual?
Update: Ana: Yes, of course I've met this "mother", that's who we're going to visit in the first place.
7 answers 7