Long time poster but nc as this is outing.
For background my sister is younger than me and is the most definitely the golden child. Before lockdown she suggested that instead of a Christmas present we take DM to Ireland to see where she grew up and went to school. I was unsure when I could fit this in as I had booked to go to a number of concerts with friends and a lot of my leave was being used up for them.
Then lockdown happened and the concerts were cancelled twice, they are finally taking place over the next few weeks. My sister had covid over Christmas so we never had our annual get together and never discussed the trip to Ireland. She is very controlling and I learned many years ago not to organise anything myself or she wouldn't come, so when she said we'd all get together in January, I just waited for her to invite us, which never happened.
My parents only ever went to Ireland for holidays and I took my children there a few times as well so in February I had the bright idea to organise a family holiday to Ireland for me and DH, DS1, DS2, DD, their partners and our grandson, they were all enthusiastic and keen to invite their grandmother who agreed to come with us. We were going nowhere near the place DSis and I were taking her. Next thing DM relayed the fact that DSis wanted us to change it to the jubilee weekend as she had no holiday available and wanted to come too. I wasn't keen on her coming, she has multiple holidays every year and this would be our only one, but I had concerts this weekend and could not change the holiday anyway.
A few weeks later DM let slip that Dsis had booked to take her to Ireland on the jubilee weekend and my aunt was worried that at 88 DM would not be able to manage both trips. I hid my anger and DM decided that she would still come with us. A few weeks ago DM's trip with DSis had to be cancelled as DSis was having an operation the week before. I suggested to DM that they could go later in the year or put it off until next year when I could go too, as originally planned.
Last week my Aunt had a party, DM was clearly in a mood with me about something despite me and DH undertaking 120 miles of round trips to pick her up and take her to the party and back home again. After I got home DD called to say that her boyfriend had asked DM if she was looking forward to the holiday and she told him she wouldn't be coming as DSis has rebooked her trip for a week before ours. Neither DM or DSis have told me about this and even if DM says she'll come with us I can't think that it is a good idea for her to take four flights in two weeks at 88 years of age.
I have been treated as second best since the day my sister as born and I am so angry I can't think straight. I booked our trip months ago and DSis booked hers about 10 days ago. DSis and I have practically no relationship due to behaviour like this, but I blame DM as well for enabling this. I can't have a go at an 88 year old but I feel like curtailing our weekly visits for a while. Am I wrong to feel hurt by this.