What can you do if your 15-year-old daughter moved in with her mom 6 months ago and she let your daughter's boyfriend move in and now your daughter is 8 weeks pregnant and you're sick about it?

Now she must take responsibility for her actions and have that baby rather than consider an abortion. Hopefully you can talk them into giving the baby up for adoption so it will have a chance at a normal life. If you can get your daughter to come and live with you, that would be good. At least you can keep an eye on her as her mother failed miserably.