Can’t get toddler (2 years old) to stop lying

Kaira

So I watch a 2 year old girl and I can’t understand or get her to stop lying. She says harmless things to other people like tells them we did something we didn’t like see a horse,play at a park that day ,ect which I don’t mind, but then she lies and says that she was naughty she got hit in the face and she seen my husband grab my butt and she tells people these things and non are true at all!! Anyone else have this issue and if so what did you do?