I agree with Wayne and best home 4u but there's a missed joint link here, if she's the sponsor of the kids she must return to Qatar for 1 day at least then automatically it will entitling her to stay for another 6 months but if she's independent and under husband visa the husband may fill a special form to immigration to extend the existing the mom and the kids outside Qatar for another 6 months by paying QR.500 for each R.P bearer to remain valid for wife and kids...