Trying not to smirk at the "ew" she heard from Biff, Vala took Barney's hands and met his eyes. She took a deep breath, then started speaking, "Barney, I can honestly say that I would not be standing in front of all of these people, here, with anyone but you."

She did look apologetically at Biff for a second or two before continuing, "You understand me, you're fantastically wealthy, and have a flexible morality that I find very appealing. But, more importantly, when I tell you things like I'm from outer space and used to have a parasitic alien in my head, you don't judge me for it. So, I promise, here and now, not to judge you or tell you what to do or who to see or what to wear, because that's not what marriage is about."

It was possible she should have written this out and practiced it first.

"I never expected to fall in love, and I didn't imagine when you first moved in that we'd end up here. Still, I'm glad we did."