I'm in my late 20s, I have a younger sister who's nearly 21, and our mum is in her 50s. Technically my sister is my half sister (we have different dads) but we're very close, especially now we're older. I'm not usually jealous and I don't normally compare, but I can't help feeling a bit hurt that mum is being much more generous to my sister. Our birthdays are in the same month and for my sister's birthday, mum is taking her to New York and giving her a leather handbag. For my birthday she gave me two items of clothing, which are nice but not my style. I realise my birthday isn't a milestone like 21, but for my 21st (admittedly a long time ago now!) mum didn't take me to New York or do anything similar. Obviously I'm independent now, I have a good job and I don't need expensive presents. But I can't help thinking that mum could have made a bit more effort for my birthday, especially given what she's doing for my sister this year. It also reminded me that mum bought my sister a car (admittedly a second hand one) a couple of years ago, when she had never done the same for me. At the time I didn't think anything of it - I was just happy for my sister that she got a car - but my husband commented on it. Now I'm wondering if it's always going to be like this and mum is going to carry on spoiling my sister. I realise I'm probably being unreasonable and should get over my jealousy, but I'm wondering if anyone has any advice for me? We are spending next weekend together (the three of us) to celebrate our birthdays and I really want us all to enjoy it!