I (18M) have so much more than my stepsister (18F) and half siblings (all younger) and my mom (45F) hates it?
My dad died when I was 4.5. My paternal family stayed close to me and semi-close to my mom. My mom remarried when I was 6. My stepdad's ex-wife walked out on him when my stepsister was a newborn. He raised her without his family or hers in the picture.
My paternal family never really saw my stepsister, or later my half siblings, the same way they did me. They were kind and would buy them all little things for Christmas and birthdays. But it was very clear who their grandkid was and who wasn't. It bothered my mom enough to take a step back from them when stepsister and I were 10. That was really tough for me and I acted out a lot because I was missing the frequent visits and calls I had with my family.
About a year later my mom got me therapy and the therapist said I needed more contact with my family if my behavior was going to improve. So she agreed. My stepdad wasn't thrilled because he didn't think it was right. He even pulled me aside and asked me if I was ready to be the best big brother and think about my siblings over myself. I told him I didn't want to lose my family like I already lost my dad and he pointed out that he, mom and my siblings were my family. But it didn't stop me from wanting my paternal family and so mom let me see them whenever but kept my siblings away.
When frequent contact resumed my grandparents were no longer giving my siblings anything and they didn't start it back up either. So my siblings never got another gift from them. There were issues because of that but I understood it. Giving less was an issue and I think they only did that for kindness and not because they loved my siblings or really wanted to buy for more kids so I think they decided to continue doing nothing for them.
Two years ago I also went on vacation with my uncle (dad's lookalike brother) and my aunt (his wife) and my cousins. It was a very big deal and something my mom really didn't like. But I asked to go and she and my stepdad didn't have to pay a penny so she agreed. It was then my mom really started to point out everything I had that my siblings did not.
And now that has become an even bigger problem. My grandparents are paying 100% for me to go to college and they have set me up with a prepaid card that they will put money into weekly for me when I begin college. My stepsister was unable to get a scholarship and my parents are not in a great position to help her out with the expenses to make it easy for her. They won't be able for my half siblings either.
My mom first started venting about it in March and since then it has only worsened. It led to me moving out just before graduation because my mom would not stop complaining and trying to guilt trip me for my paternal family being invited to my graduation. She didn't think it was right since my stepsister was also graduating. A few days after graduation mom told me she hates how much more I have compared to my siblings and she said she really wishes I would reject it or distribute everything out so we all have something to help us along.
I'm looking for advice on my relationship with my mom primarily because right now I don't think any of them will improve if we're not getting along. She's so so angry and disappointed which I don't think is entirely fair but I get it too.