I get Aunt rights by default! Congrats! That is so awesome! I know how scary it is, especially the first time...best of luck tomorrow and keep us posted. Any questions...just ask. Between all of us "older" folks here, we've got hundreds of years of experience of child raising.
Oh yea...first words...all of my kids said "dada", much to my dismay. A doc once told me that it was because that is the easiest word to say...but Bon-ne is a close second. Work on it!
Hugs to you and your gf!