I would kind of weirded out by that text. The good news is that you were reading a book about boundaries and so you’re hyper aware of when they are crossed. That’s normal and you will get more comfortable with protecting your boundaries as time passes.

As far as validation and your mother. I can see how you would get pissed off. However I hope you get to a place where you won’t seek validation from someone you know is incapable of giving it to you.