I don't think so that you need to have separate wordings on your wedding invitation cards for relatives, as there is formal way to write wordings on invitations what you will have seen.
have you made it all by yourself. If you made i t then it is incredible work. I would like to know one thing that is missed is price. Is prices negotiable??
Sheraton is a well known hotel, and lots of packages are there what you want to have, you can choose according to you.
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I think time has come to send out your wedding invitation cards, as usually wedding invitations are sent before 6 months ahead of the marriage ceremony.