What do you do when someone you know is lying?

I have a friend on social media that has been posting pictures claiming she gave birth to a little girl. However, I’ve seen her post things about being on her period and how she gets so many bad cramps all before she apparently “gave birth” She then claims she’s lesbian but she continues to post things about an ex boyfriend who would take advantage of her and whatnot. I guess she doesn’t realize people can kind of tell when you say something but are posting something else. Should I confront her about it?