reemahf, I hope your realize that bringing a relative from your own country to be a nanny for your children is illegal. It is also illegal to bring someone over on a business visa for full-time, permanent work here in Qatar and there is no such thing as a legal "free" visa. While I appreciate your concern and hiring a relative seems a good solution it's just not a good idea to contravene the law here in Qatar. Your relative (and you) could end up in a very precarious situation.
Mandi