When is a deprtation valid?

Your 'friend' is illegal and a complete liar no one who is legally trained would tell her that as it simply isn't true

That's totally bogus! Deported twice & returned while under bar to reentry? First of all, most deportees are deported because they committed a crime. It's quite rare to be deported solely for visa/immigration violations. Also, returning illegally while under bar to reentry is a major felony, making her subject to 20 years in prison before deportation with permanent bar to reentry.

There is NO valid reason why she has not applied for her spouse's immigration to her country of citizenship. Except that she probably only married in an attempt to remain in US despite her repeated lawbreaking.

You don't want a "friend" with such disdain for the law, and repeated criminal behavior. She's a fake, a phony, a fraud, and you do not want people like that in your life. She's LYING to you! No legitimate attorney would spout such nonsense. She's full of bull.

That's bologna. She is inadmissible to the US for life at this point.

"Unlawful reentry" while under the bar is a felony, punishable with 5 to 20 years in a federal prison. It also makes the person ineligible for admission to the United States for life. Your friend will never be able to get a Green Card to the United States in this lifetime, so she should start the process to petition her husband for immigration to her country. With the Trump administration now in charge of the DHS, it's very likely that they will come for her.