Shocking possibility of an opportunity?

Sooo....this was totally unexpected but...let me get on with it.  Shawn's (my dh) cousin had a baby last October 30th when she was 14 just shy of 15. Which makes her 15 now, just shy of 16 and her son just turned a year old. I guess she told Shawns uncle that she was going to give him up for adoption (but its not a for sure thing yet) but anyways so my inlaws were over last night telling us about this. Then I made a comment like "Im sorry to sound so mean and bitter, but why can children like that have children and I cant?" and then my mother in law said something that blew my mind. She said "well yeah I was thinking about that, and I thought if she did give him up that it would be nice if he could go to somebody and still be in the family" Obviously implying Shawn and I. Im not sure how I feel about this at all. The idea in alot of ways sounds nice. I want children more than anything, and I do want to be able to have one that is biologically Shawn and mine, but maybe the timing isnt for right now (I know Im going to have one, thats another big long thing I need to blog about that I cant believe I have not done yet). But I just have so many thoughts...I know adoption is expensive and you need to meet a lot of requirements, am I even going to meet those standards? Its going to be a huge adjustment for him, we havent really seen him that much. Am I going to be able to immediatly go from one night not having children to the next day having a toddler I know nothing about? What if I get pregnant right after this? Will I be able to handle two children so close in age? Do I really want to do this? What if she doesnt go through with it and I get my hopes up?....Now that I think about it I had a dream like two weeks ago that one of my friends who is pregnant begged me to adopt her baby. Granted its not the same person, or situation...but is this why I had the dream.....My thoughts are so clustered and I have no idea what to think or do...