I like it, but I like a lot of "nick-namey" girl names! I don't think it will sound too immature on an adult at all, but then like I said, I like those types of names.
Sarah -
Wife to DH
Paul (Since
July 4th 2009)
Mama to
Jasper Emmanuel (Since
August 6th 2010)
Due with baby #2 in
August 2014