T.O.
I can by no means tell you what you should or shouldn't do because I don't know you or anything about your life. All I know is that four years ago we brought home and new born baby that was like family. His mother was our nephew's girlfriend. He has been alot of work, he is extremely active and our youngest before him is sixteen, so there is a huge age diffrence. We also have an eighteen year old daughter and a twenty-two year old son. They have all been alot of help with him and let me tell you, I would never think of this decision as a mistake.
This decission is one that you have to make together with your husband, and do alot of soul serching. How does the rest of your family feel about this decission? Will they be there to encourage andhelp where needed? My mother and my in-laws have been more help than I ever imagined. You may want to talk to some foster care parents to find out what you will be getting into. My Sister-in law is a foster care parent and I have seen alot of children coming through her house over the years. Some have bene great and some absolutly terrible!!There is alot of baggage that she will be bringing with her and this is something that you need to understand you will be helping her with.
I think that this is a wonderful thing that you want to do, and I would never discourage you from doing this. I think that family should always step in if possible. We should always be available to help our family in their need. Just make sure that you and your family is ready for this, and make sure that this is something that not only she will agree with but also the mother of the girl. In the foster care system, the foster parents can't even get the children haircuts without getting the parents permission. You will defently want a good flow of communication with the girl's mother.
Best of luck to you and this girl. May God bless you in your decision!!