you said that was one reason why she was refused, they hardly ever have just one reason unless its a very good one to refuse her,most of the time they will have a few reasons
are any of the reasons justified?, do you have further evidence you can use, if so write to the ECO manager and ask for reconsideration.
one thing with a family VV is the full rights to appeal. but as already mentioned it can be a long process.
the appeals process can be found here..
http://www.tribunals.gov.uk/Immigrat...um/Appeals.htm
