I hope your niece will be very happy in her wedded life.
We haven't gone to many weddings in the past few years. The invites were from ones who had lived together for 3-4 years, threw big parties and wanted no 'wrapped' presents, just money for their fabulous honeymoons. I sent cards, no money. We had our fabulous honeymoon to Hawaii, paid for by ourselves, for our 32nd wedding anniversary. I'm sorry I sound so hardnosed about it, but the divorce rate is 60% now. And FB didn't cause that statistic.