And what are they studying? What professions or fields are open to Saudi women, in Saudi?
Wikipedia says some field aren't open to women, but doesn't say which ones. I believe her mother teaches sociology. At the women's college in Jedda the following degrees are offered: "Management Information Systems, Special Education, Nursing, Banking & Finance, Interior Design, Graphic Design. A program for Law Studies is planned for future."
In any event, it's not true that women can't attend universities in Saudi Arabia. Something like half of the university students there are women. Men and women don't attend the same universities and women can't study abroad unless a relative accompanies them, but there are opportunities for higher education for women.