I would say to wait and see what happens, so much can happen in six months, your toddlers will be older, maybe the bmom will get some medical and other needed help. If the baby is going to be placed for adoption I would say go for it so that all the siblings can be together. But I would also do foster care as that allows contact with the siblings also, if she has placed three times before I would almost say that she will have to place or end up having the baby taken away since it seems she is not stopping the cycle she is on. I hope that whatever you decide will be the best for you and your family. From an Educational point of view, I can tell you that drinking is worse than drugs for the unborn baby in many ways, but again since no one can find her it is unclear what she has been doing etc. But again, I wish you luck in what you decide and please keep us posted
Summer
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Adoptee 1979

, BMOM to E 1995, mom, and more