How do I support my fiancée when his parents show favoritism towards his sister?
For context this issue isn't new, he has felt this way for a long time but it made him very upset this weekend.
We just got engaged & his parents flew into town to celebrate. Afterwards, he expressed to me how sad he was that his parents seemed to be prioritizing his sister over him this weekend. At each activity or dinner, they would sit next to her and talk to mostly her the entire time. He would talk to them briefly, but he feels like he hardly got much time spent with them and instead his sister talked to them much more. She was actually talking to them about her wedding most of the time, which rubbed him the wrong way because we were celebrating our engagement. I noticed him trying to have conversations with them, but their conversations with his sister definitely dominated their time.
They left and now he feels jaded towards his sister & parents. I want to best support him and help him to process these feelings so any recommendations are appreciated. I would like to think they are good people who would not purposefully make him feel this way, but from my outside perspective I have seen for a long time they talk a lot more to her and involve him in much less.