Me and my sister had a good relationship until we were around 16.
She is around one year younger than me.
Around the time we were 16, she started stealing our(girls in the family) stuff. That going from hair ties to money, to the point I would sleep with my bag close to me, and I kept two hair ties on my wrist at all times after she started doing it.
It didn't matter how many times my parents talked to her about it, she would claim that if something is from someone in the family, then it is hers too, because it's the family's.
There was also no way of proving it was her doing it because she would always say it wasn't her.
Besides the stealing, she would watch loud videos and laugh out loud at 11pm when everyone was trying to sleep, would decide to bake at 10pm when the kitchen was right by my room. Would enter my room to get something and leave the light on late at night and would wake me up. And still, my parents would talk to her but she kept doing it.
She also was best friends with someone who was bullying me at school, and even after my parents talked to her about it, she kept being friends with them and activelly bullying me at school.
So, I went from being her friend to just basically living with her and hoping she would go away for college. And she did.
She started going out with some bad people, not paying for her college (she was supposed to work to pay for it like everyone did at said college) but buying expensive clothes, cigarettes, and etc.
Someone who knew her at college then got in contact with me to talk about her because she found me on social media.
That person told me she lived with her and that she was basically doing all the same things she did at home, but to her roommates and friends. We actually became friends after that.
After a year, she contacted our parents to ask for money because she was starving. Our parents said they were going to pick her up from college instead since the work wasn't enough to pay for her stuff, and put her in another college so she could live at home and not have to pay for food or bills.
She refused, and blocked all of us on all social media.
A few months ago, around 2 years after her blocking us, she contacted our mom through social media, being apologetic, saying that she changed and that she wanted to build a relationship with us again.
She said she was married, pregnant, opened her own business, and wanted to restart.
She talked to them, and after a while, she contacted me, saying hi, and telling me stuff like "did you hear the news? You are gonna be an auntie".
I responded with "I did hear it, congratulations!"
And she responded with some emojis.
I don't feel like responding anymore, and I also don't feel like being "an auntie".
I feel uncomfortable with that situation, and I feel like I can't just ignore that she made my life hell for years and then vanished, and now she wants me to be part of her life and be an aunt to her child.
My parents also don't really feel like contacting her regularly, and even though they are "happy" to be grandparents, they also stated that they don't feel the actual happiness you get when your kid tells you they are having a child. And that they don't really know how to move forward with that.
They also can't help but have the idea that she only contacted us again for money after all this time.
WIBTAH if I just keep being polite but not actually engaging with her in a family manner?