Hawaiian Themed Wedding

WE live in a very small town in he country in Ohio and my daughter has decided to have a hawaiian themed wedding in july of 06....we have come up with some very unique ideas , but i am hving a little problem with what is appropiate for the mother of the bride to wear...we have purchsed all the wedding attire from hoholulu and even a sarong for me.that my daughter has picke dout but it does show a little skin...on the shouldrs and in the bust line...is it inappropriate for me to wearit if that is waht my daughter wants...and what if the guests thinks it rediculous...i am a plus size woman and yes it covers me and looks good in my eyes, but what is appropriate?...ty for you rhelp

Margie