for ..... Aya's wedding that he had come. for here indicates purpose.
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He said it wasn't ....for ..... Aya's wedding that he had come.
for here indicates purpose. This is the best choice.
He said it wasn't ...until ..... Aya's wedding that he had come.
until here relates to the sequence of events, eg up to the time of. but it is difficult to find a clear meaning.
Clive