You can use any title you would like to. For example - you can use one of the sayings for Sister and use it for Aunt. Words can be changed. Also the words can be either singular or plural (example - "we love you" or "I love you").

Grandparents:
My heart holds a love which belongs only to my Grandparents. A love so strong nothing can take apart, unravel or even tear. Mixed in with that love are the memories that only we share and will fill it with Memories still to come. Only a Grandparent can turn tears into laughter, never say, "I told you so," and Truly listen to and understand me. When I look at you with my pleading eyes, it’s clear to me you Will let me get my way. You will look the other way, only to stand In the way when I shouldn’t get my way. Holding hands as we walk will someday be replaced with long Talks as we walk. My Grandparents are so special. I will hold onto their love forever and return it with much more. ( ITEM #S1 )

My Grandparents: No one in the world can take the place of my grandparents. The warm welcome you give me when I see you and the love you so freely give can come from no other then you. Everything I do, as you see it, is perfect and always has your approval. You always find the time for me and put everything else aside, just for me. You always make things seem better when things just aren’t going my way. Just for me, you have many words of wisdom in such a caring way. There is something special between us; an understanding we have only for each other. For you, I will return to you all you have given to me. I will always be there for you and there is always time, just for you. When you need words of wisdom, I know I can give it to you. After all, I have learned from no one other then you. You always have my approval, for you are the most perfect Grandparents. I have lots of love tucked aside, just for you.
( ITEM #S2 )