If you have two enemy families, how can you bring them together in one room peacefully without casualties?

I'm writing a book and it's based in Scotland in 1309, but my main character is a woman from 2009 who went back in time. She is related to one family and is suppose to marry the leader of the other family but she needs to make him fall in love with her. I need a way to get the two warring families together peacefully so she can have a chance to make him start falling for her. Any ideas?If you have two enemy families, how can you bring them together in one room peacefully without casualties?
Why not have their overlord be having some sort of gathering. Unless they're on opposites sides of the Bruce/Balliol feud, this would allow them to interact. Perhaps, a third party gathering. You could make the host someone too powerful to offend, or even make it overseas in Denmark, with the sides currying favor.



Although, given that Christmas wasn't that big a deal in that time period and the hardships of midwinter travel, the idea of a midwinter gathering that doesn't involve people staying for an extended period is rather ridiculous. You just didn't travel that time of year in Scotland, so they'd be there for a long period.



That sparks a different idea, why not have both sides forced into the shelter of a third party during a blizzard? They'd be forced to respect the host and not have open warfare, but you'd still have all the intrigue and maybe steal a bit of Shakespeare and kill off Mercutio.If you have two enemy families, how can you bring them together in one room peacefully without casualties?
I think you need to win the other family over one by one. It's too hard if everyone is hating everyone else. If she can gradually bring one person at a time to her way of thinking and then when the two families come together she has support on both sides and they can help her convince the rest of the people.

I think it's too hard just being her against everyone.
Okay, I have absolutely no knowledge of Scotland in that time, but could you have some kind of Christmas ball type thing where both families are invited? A little bit of dancing, a few drinks, maybe some mistletoe...? Any kind of party that was thrown by someone both families know would be good. Hope I helped!
I'm with Annie, a Christmas party they both attend would be a good idea, maybe have the young children getting along, or a well respected individual introducing the head of the families to one another, so they have to pretend to like one another, and find that they aren't so bad.