I have read the post. I am not clear how on the one hand the sister claims she worked for big companies such as Google and the parents are proud of her for that and on the other hand the parents pay for all of her expenses including rent and she, at 50 (!!) lives with them. Where did the money go that she supposedly earn when she worked for said big companies?

I cannot help notice in your post @jesyka that it is replete with using mental health terms in a pejorative sense. Look at just two examples and there were more in the text:

"My dad would constantly yell at us in public. He’d especially yell at my retarded mother often."

"She acts & talks like a young mentally challenged child often."

Are you recycling how you have been called when you talk this way?

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I am also not clear what was inappropriate about the following:

"She would also bring up old dates & how men used to wait for hours in the car for her which was inappropriate."

Was it inappropriate that men waited for your young mom for hours? Was it inappropriate that your mom would tell you about it?...

Further, you wrote:

"She was so inappropriate that she even asked to see my breasts after I got implants put in. She wasn’t joking about that. I said no of course."

While your new artificial breasts are your private business and you are well within your right not to show them to your mom, the curiosity about them is not so outrageous. She asked, you declined. What is the big deal? I did not know about your implants, by the way. I thought you were naturally well-endowed.