Here is what I have come up with based on the advice and suggestions on this board recently [note: our names are set apart by a different font and color and spaced where it is obvious that the text above it and below are to be read continuously, if that makes sense. Also, the text is all caps so the capitalization of the first letters of words is not important]
"Together with our Parents
We Request the Honour of Your Presence
at the Nuptial Mass in which
Bride Name (scroll font, set apart)
& Groom Name (scroll font, set apart)
We Will Be United in the Sacrament of Holy Matrimony
Saturday the Twenty-Ninth of August
Two Thousand Twelve
Three O'Clock in the Afternoon
Catholic Church
City, State
Reception to Immediately Follow"