I have an older sister who exaggerates/lies all the time. The most recent examples relate to her job hunting. She works in IT as part of the company's IT support team. She apparently has been headhunted for deputy head teacher job (which she turned down) even though she has never been a teacher or manager. She also exaggerates/lies about other stupid stuff like her house costing £500,000 when it didn't and her husband earning 6 figures when he doesn't. Her nonsense is usually something minor and easily disproven.
That gives you a flavour of her exaggeration/lies. I've got dozens of other examples.
Today she has called my parents to to say her gp has diagnosed her with a condition which I know for a fact a gp can't diagnose without either seeing her in person or running any tests. The condition is usually diagnosed after seeing a specialist and having tests done. I know because my boyfriend has the condition she is talking about (which she also knows). She has now posted her diagnosis on Facebook and has received lots of sympathy.
Usually her nonsense doesn't bother me as it is harmless. However this time she has gone too far. Our DPs have called me really upset and worried for her. The condition she has picked is serious, painful and life limiting.
AIBU to call her out on this (privately first)? The problem is she never backs down when caught out so she won't retract her FB post willing which will mean I may have to do it publicly. She could easily say to people her gp made a terrible mistake but I know she would never back down.