Josh says: Speak up.
We all have that one friend who’s constantly stretching the truth, and it always starts with one lie. Talk to Heather and help her avoid becoming that friend.
This particular lie isn’t exactly hurting anyone, but that doesn’t make it OK. If she gets away with it, she’ll keep doing it—and eventually, one of her lies will end up harming someone else.
The reality is, people are bound to discover that Heather is lying. Sooner or later, someone is going to want to see photos from her travels, or they’ll ask her a question she can’t answer. Once that happens, they’ll never believe anything she says again.
You don’t have to call her out in a mean way—just tell her you know where she really was, and point out that she can’t hide the truth forever. It might cause her some embarrassment, but you’ll be doing her a favor. Lying never leads to anything good.