Had a sudden flash of inspiration and after checking the wiki I discovered that Veronica and Sarah Lyons are only a few years apart in age. Do you think they knew each other before the Lyons went on the expedition to the east?
It's possible, as they both grew up in the same chapter (but not necessarily the same base). But we know that she would have at least known who Sarah was, since the Mojave BoS had learned about the Outcasts deserting Lyons.