Hi...
'If you can't beat them, join them'...
Let's try and look at it from a different angle...
If you insist on refusing, they'll all be angry at you.
If you take the pictures, there's a chance that they may like them.
In the first case, you loose for sure. In the second, there's a chance...
Now, how do you feel about your child photography? Good?
If so, the only difference is that this time the kids play 'wedding'...
What I mean is, that poeple are people.
You like taking pictures of little poeple. Why not regard it as a
chance
to get some experience at
documentary photography?
Why not look at the "job" itself from a different angle:
This is a chance to walk around and capture some special moments.
An emotional hug of the bride and her mother.
A kid under a table.
The closeness between the groom with his friends, etc'.
If you think that you can capture some special moments, you could give them a CD that will be better than what most pros can, because you
know the poeple, you know what pic' captures them most typically.
so, if you say no, they're all angry. If you say yes, you may gain experience, and maybe apreciation...
I'm not a wedding phot', by the way... but I've been "in your shoes"...
Best luck either way