It's much worse than that. She was dumb enough to document it all on facebook before it was removed. There's screenshots on the web.
Her real name is not Ilhan Omar. She snuck into the country with the Omar family. It's why her brother and sisters have a different last name and why it wasn't caught at first when she married her brother.
She posted about visiting him and her sisters in the UK before they came on facebook.
I'm confused why nothing has happened.