Every year my nephew invites me and my family and my sister and her family to his a few days after Christmas. He has a wife and 2 daughters. He's been doing this since our eldest sister (his mother) died 10 years ago. He usually contacts my sister with some dates and she and I get together to agree on one of the dates. This year he has phoned my sister with dates but not mentioned me and my family. I'm really hurt and can't think off anything I could have done to upset him or his lovely wife and daughters.
My nephew's wife's father died in November and he phoned my sister to tell her and mentioned that they were encouraging people to attend a thanksgiving service a week or so after the funeral and gave her the name of the church and the date. He didn't phone me and I thought it was maybe because he knew I'd hear about it on FB but I wasn't invited to the thanksgiving. I sent a card to them to say I was sorry about the loss of J's dad.
I am honestly at a loss to understand this. We only see them about twice a year, once in the summer and this one christmas visit. One of their daughters has a little boy and I have presents for him. My sister doesn't understand it at all, but I've made light of it because she would worry over something like this.
What would you do?