Getting a bit fed up of her showing off

Good point Bluebelle and I'd add to that, does she simply talk about herself all the time or does she ask after you and your family and show an interest in your answers?

I don't agree that it may be her age or her self esteem or anything like that and I certainly don't think she needs reassuring some people are just full of themselves and the more they get and have, the more they need to tell the world

Her privileged life style has changed her over the years and you are now starting to notice it through FB and other social media She has been influenced by those around her She s had apparently a blest marriage, pampered lifestyle and is now so far away from her roots that you are noticing the unattractive side of bragging

Does she ever give you a treat, take you away for a break, or otherwise use her money gained over the years for helping others does she worry about you, ever offer to pay a bill if you struggle, give her brothers sisters or parents a handout?
If her bragging is equal to her generosity carry on accepting her weaknesses if not then I d tell her she's become a bore

bytheway try not to get wound up by your sibling. Perhaps you need to gently ask her if these things are worrying her as she seems so fixated on them. This could well be the case as there are big changes coming for her and her husband. She may quite reasonably be concerned that her husband, who is clearly a high flyer, may find it difficult to settle for what may well eventually be a much quieter existence when it is just the two of them. She may well be seeking reassurance from you that everything will be alright. The trouble is that she is pushing away the one person she may well be relying on. You need to reassure her that you will be there the same as you always have been and that money is not and never has been the thing that binds the two of you together and nothing is going to change between you however much money will suddenly arrive in their coffers. Make sure that you tell her how happy you are for the two of them and that she needs to keep a journal of this tumultuous time of her life. Writing things down can be a real help to get a handle on what is happening to you. Just try to imagine what is driving all this talk as it will not only be excitement, there could be a bit of dread hidden in there of which she has no conscious notion at present..

Self esteem is what comes to my mind.
And very possibly her easy adulthood isn't as wonderful as it appears when looking on. Money isn't everything .

Could be that there's an empty space in her life and she's trying to fill it.

The first thought is that she has self esteem issues, maybe?
Perhaps something has subtly changed for her, over the years, and she now feels the need to prove herself somehow?

The inevitable mention is: How old is she and could this be start of mental change?. I do not necessarily mean dementia, but I have seen changes in my closest friend, which includes constantly putting putting me down, I have attributed it to age and illness.

Dear Bytheway, if she has to big her self up all the time, she might be insecure about something, the husband ?? It's not you.