She's been with us for 5 months in a different state and we have 2 girls under 2. I understand that she misses home and her friends (that her mom doesn't let her see even before covid). I don't think BM is the better parent but she's familiar and SD is a teenager. 

It's bittersweet but also a relief. SD is very cautious and won't make decisions for herself. She isn't very nice to the babies. My husband works 60 hours a week and is pretty hands off. Maybe she'll come back in 2 years for college like she said she plans to.