So, not unexpectedly, Brent mans up in the most mature manner possible (A Real Mouthful). This isn't bad, I guess, it's just predictable.
I appreciated Scott's comment, and can appreciate where he's coming from, but I don't buy the idea that you have to break new ground to tell a satisfying story.
Let's take a look at the whole mother thing. (Those 300 words want out.) "How could I let you marry a man I've never met" is perhaps the least interesting motivation that I can think of for Jade's mom. It makes the character only one thing: Selfish. One dimension does not a rich story make.
An alternative: Jade's mother is single and rich, but estranged from her daughters and incredibly lonely. Without telling Jade, she cancels all the existing wedding plans, and makes alternative arrangements: An outrageously extravagant trip or cruise to an exotic locale, for the entire wedding party, with the ceremony taking place on the same island on which Castaway was filmed. (I've been there, actually. Not a bad choice.) A month of wedding and travel with her daughters and their friends -- What could be more perfect!
Unfortunately, she neglects to take into account her daughters and their friends. She also neglects Brent, almost pushing him out of the picture entirely in her need to be close to her daughter in this most important time for family.
After an initial moment of "Oh my god so cool!" Jade and Brent realize that, because of the length of the trip and the suddenness of it all, many of their friends wouldn't be able to make it, and they can't live with that. A wedding isn't about the glamour of the ceremony, it's about the people around them.
After some hemming and hawing, they have to break through the alpha-Mom facade to tell her they just can't do it. This gives us the perfect opportunity to use the "I'm sorry" moment I dislike so much in a way that provides tension, and moves the story forward:
It's a perfect opportunity for Brent. Both Jade and her mom (and the readers) are set up to expect "Sorry, but that's the way it is." Some folks might even expect Brent to rub it in her face a bit. But. Brent ends up offering an olive branch to Jade's mom because it's just as important that she be there as everyone else.
Tears all around. Enter Robbie.