How do I talk my friend into not having another baby?

My friend was about 3-4mths pregnant, about two weeks ago she had an ultrasound and they saw the baby's heart was on the outside, along with a few other deformities. Last week she found out the baby passed away. She had a d&c last Friday, and was already having sex again Wednesday. My friend isn't the most stable person, she's 32, and dating a 55ish man (not that it's anything wrong dating older). But she's a recovering alcoholic. Two years ago her two kids were placed in foster care, because of her drinking, and to be very honest I don't think that she's trying to get them back, or care to. One child is 4, the foster mother recently found out the child has a few development delays, (she dropped him when he was a baby) and the other child is 2 (her drug test came back positive in the hospital, during labor, and he's been out of her custody since 3mths), and he's with his father. I try to talk to her about getting a stable job, and working on getting her own children back before having another child, but she doesn't seem to listen. And her boyfriend, he's just as much of an alcoholic too. They fight often, to the point of them both going to jail. I honestly don't know what else to say to her, or if I should just back off from offering advice. Any suggestions would be great. Thanks