I think that sounds fine. My parents are divorced too, and although all the parents were very generous in contributing what they could afford (and we hadn't expected anything) as far as I was concerned we were definitely "hosting" our wedding.

Ours simply said "Liz and Stephen request the pleasure of your company at their wedding" or something similar. Nobody commented (and they would have got short shrift if they had!).

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* Liz & Stephen 11 June 2005 * Our special boy Zachary Samuel born 6th July '07