Your situation has a lot of issues that will require time and effort to try to solve. I say "try" because there are times when things just don't work out. It is illegal for unmarried couples to live together in Qatar. It can be a problem for her to bring her child here if her ex-husband doesn't like the idea. It can be a real problem for a man to sponsor a child that's not his biological offspring. You may want to take some time to consider this considering you've just begun this relationship a month ago.