From what I've seen, any woman who looks even remotely good looking is going to be taking selfies every chance she gets. Pair her up with her best girlfriend who also happens to be hot and it gets even worse. Just a fact.
It's vanity. Her self-esteem is based on her looks. She gets validation from all the likes and people making flattering comments.
It would help to understand a bit of Russian/Ukrainian culture here as well. When the man - who likely has all the money - can just as easily trade in his wife for a younger, probably more adoring version, it doesn't take a whole lot to piss him off. It's all about options. When I lived in Moscow, it was about 8 to 1 women to men ratio. Finding another girl when the one you had did something relatively annoying was an exceptionally easy process. Given that many Russian men have mistresses and a surprising amount of Russian women/girls look for "sponsors" (someone who will pay for their flat, etc in exchange for sex, etc) the whole idea of the sanctity of marriage isn't the same as in the West. This is not to paint a broad stroke across everyone in eastern Europe, but it was quite common in larger more "cosmopolitan" circles of Moscow, Kiev, etc.
My friend now has a serious relationship with a Ukrainian woman. They are already engaged, but the parents though draw up a prenuptial agreement in Ukraine https://en.clc.co.ua/marriage-ukraine/ Considering the information above, then this is normal practice in this case.
We could have free energy , quantum glass batteries from professor John Goodenough, photonic computing, blockchain and resources based monetary system without Fed... but no. People are in the state where all they can do with tech is selfies , making videos with kittens, spam, online frauds, paid PR and what else haters on internet forums. Others compete who has the faster car or motorcycle. Humanity... what a bunch of losers