I don't think it's being dishonest unless you tell her she can do what she wants, you are only giving a little time in hopes of a better outcome when you discuss this again after.
"Ok I will take them down for now and when we have the whole package together we will sit down together and go over it."
Where is the lie? She knows your position and it is unchanged IMHO.
I like this. It's acknowledging and hopefully can leadto resolution.
the problem is...what does he do AFTER the wedding, when they sit down and she STILL insists on her pictures not being used in any way.
after the fact, neither of them have much ground. he either takes a hard line and sticks to the legal contract and pisses her off....or he takes a hit on all that work he has put out to make her happy. there wont be any middle ground. I think it may be better to just cut his losses. her mind is not likely to change. i sure wouldn't gamble on it.