Yes, an adult adoption can be done in Texas, contact the County Clerk (and hopefully, they are nice
) to find out what forms your county requires for adoption.
http://www.adopting.org/adoptions/ad...tate-laws.html
You can read more about the law in Texas there
Nancy also writes about Adult Adoption on her blog, here:
http://www.adoptionblogs.com/index.p...9/p189#more189