I remember when my sister, who is 2.5 years younger than me had a baby at 18. All fair and well (we all lived at home).
I pitched in with babysitting when I could and didn’t complain as I was single and had nothing better to do.
Then I met my now dh and suddenly I had plans.
One day, my sister asked me to babysit so she could go out on the piss again. She did this usually weekly.
This time, I said no, because I had plans with dh.
She went crying to my dad who ripped me a new one because I wasn’t helping out. He and my mum couldn’t do it, because they wanted to go and get drunk too, which was a daily experience with them getting blinded every weekend.
Ended up having to cancel my plans to babysit my niece with my dh instead of doing something else.
Was it appreciated? No
Did I get a thank you at all? No
I just got bitched at that I shouldn’t have been bollocked in the first place to help. Funnily enough, this is just one of the many reasons I have no contact with my family