crimsonladybug: April 26, 2008 - 10:27 PM PST
I would definitely get with the son (and or his fiance') and find out what they want. My own experiences with singers in wedding ceremonies have been when the couple asks a friend to sing something that is special to them (usually because they needed a way to incorporate said friend into the ceremony but already had all the bride's maids/groom's men/ushers they had room for).
Maybe that's not the most helpful answer but it is his wedding, not his mom's (even though mom's tend to think otherwise :P), so he should have the final vote in what you sing.
Maybe that's not the most helpful answer but it is his wedding, not his mom's (even though mom's tend to think otherwise :P), so he should have the final vote in what you sing.