Kourtney: You were a good friend of Kylies and she introduced you two
Kim: You were a famous ______ and you two had met at an party
Kendall: You were a related to the fashion designer doing the clothes and they invited you to the after party where you met
Khloe: you worked at fashion company and she came in to get some custom clothes for a event
Kylie: you were a model like Kendall and you met at a show
