Thoughts?

I have a stepdaughter. Recently she has been wanting to fall asleep in our bed. We live at my SO's parents house right now until i get a better paying job and can move out. We have a full house here with no available rooms so our daughter has a bed in the living room and sleeps out there with my MIL(she sleeps out there choice and always has). Daughters mom lives with her husband in her MIL's house and its only them and the kids so they all have bedrooms and daughter shares with her younger sister. Our daughter has never had any issues sleeping she falls asleep fast and always in her bed but recently she hasnt been wanting to she wants to be in our bed. She stays in her bed if she wakes up its just going to sleep. I know she doesnt like being alone to go to sleep but she is asking even when my MIL is out there to be with her. Im not sure why she is doing this all the sudden. Does anyone have any thoughts?