Nc for this.
Will try and give all the information and not drip feed. SIL married BIL (DHs brother) about 7 years ago and they have a 13 year old son. She has two older children from her previous marriage. They had gone out together very briefly when they were younger so she was known to the family. I am with DH 25 years and married for 17, 4 kids.
Over the years SIL has gradually taken over any celebrations with PIL. Every year we visit MIL for her birthday, her birthday was yesterday, St Patrick's Day. We called around and they were out so left her card in the postbox and DH texted to say we had called. MIL texts at 6pm last night to say they were with SIL and BIL for the day and had a wonderful time. That's fine, DH asked would they like to drop in on their way home as they live around the corner from us, MIL replied, no thanks, too tired.
SIL never invites our family when she is hosting but it's steadily getting out of hand. She invites PIL for both their birthdays, Boxing day, New Years Eve and New Years Day, Easter Sunday. They visit for coffee after church every Sunday too.
Then it's the huge bouquets of flowers for Christmas, Easter and Birthday's and the specially made cakes. Anything we give looks miserable in comparison.
She has now started with other family members. She hosted a significant birthday party for another relative in her home when she knew we would not be able to attend which caused bad blood as it was a surprise party and she told the person we were invited but didnt know why we didn't turn up. We were away, we go away the same time every year. She knew this.
I'm just sick of it now. She is obviously the golden DIL as far as PIL are concerned.MIL loves to be adored.
What is this type of behaviour and why would somebody behave like this?