My mother has always been the more extroverted and charming of my parents whereas my father is the quiet, dependable one. Nevertheless, they always had a happy, companionable married life. However, in the last few years my mum's career has really taken off. She's now far more successful than my dad and also moves in a more rarefied social circle as a result.
I've noticed that mum has also made a lot of quite impressive male friends. Like I said, she's always been charming and a bit flirtatious and it never bothered my father. But I can see that he feels threatened by the company she now keeps. For example she was in Lisbon for work a few days ago and then went to a little beach town nearby to spend the day (alone) with one of her business colleagues who has a summer home there.
I was at my parents place for dinner today and my mother was telling me about how much fun she had, how he taught her to ride his vintage motorbike and so on. My father made a lot of passive aggressive little jokes throughout this conversation and the atmosphere between them really saddened me. It felt like my mum has become contemptuous of dad and he's become resentful of her. How can I tell her gently to stop flaunting her fancy new male friends in front of my dad?