Hi, Crystal -
Consent in MO can be given after 48 hours and it is irrevocable except for certain situations. MO also has a putative father registry. Finalization occurs 6 mos after consent but since you are in another state, you should get legal counsel ... you will have to do an Interstate Compact and, depending upon the county your relative is in in MO, there may be short-term foster care involved.
Go to this page on the site ...
http://missouri.adoption.com/
Good luck!!
Namaste,