Blessings?

My brother and his wife finally were able to bring home their baby from the hospital after being born much to early.  She is so very cute and we just love holding her.  My mother is in grandma heaven and my father is still my father.  This brings me to the question:

My brother and his wife have asked me to give this little angel a name and a blessing this Sunday.  I am so excited, and worried.  I know that he has asked me and I am always excited to do this but I almost want him to know that even with it being a great honer for me it would be even that much more to our father.  Grandpa in many respects be the one doing this for them, showing them the power of the priesthood in the home and what benefits it can bring to faithful families in Zion.  So I am very conflicted over this, without making him feel bad or putting pressure on them I feel that it may be even that much better for him to do this for him.  So what do I do? How do I express my feeling of so much joy that they asked me and yet I think this is a job for grandpa?  Feel free to share your thoughts on this....