What you recounted is very similar to my father's experience in his early career and supporting his sister and her husband. The fight and separation still haunt my father; I think I've seen him mention his sister's name only 3-4 times since I came to my senses. When she was on her death bed breathing her last breath, she asked my cousin if my father could go and see her; when I asked him, he stayed quiet and didn't bother making a call or anything. This was last year.
The problem with money is it destroys families from within.
I agree with you on the baby-making part, I'm not against it, but they should only produce once you are stable. I believe you do a disservice to a child to bring him into this world to suffer along with you. My wife's sister married in 2020 and already has three kids (first daughter, then two twin boys). Their house is a double story with an uncle, a wife, and two children on the top floor. The married sister-in-law occupies the first floor with her three kids and husband and her in-laws comprising uncle, aunt, and two brothers-in-law.
On top, the other brother is getting married this year, and I'm sure we'll hear of another child being born within one year. When I asked the wife what his income level they said, "Guzara" I told her that meant their primarily hand-to-mouth and not a position to be in.
Her older sister, that married and has one daughter, is getting funds from my mother-in-law to run her house. I told the wife I hoped it doesn't develop into a situation where your second and third sisters must reach out to run their house. The sad part was when the second sister was popping kids, the oldest praised it as some accomplishment and threw words like "ghar bangaya." Yet, neither of the husbands and husband-to-be are educated beyond 8th grade, and the youngest dropped out before he even took the exam to get into 9th grade.
I count my blessings every day. I came from a financially stable and robust side of the family.