If you are maintaining F-1 she was still in F-2 along with TPS. Getting TPS and working with TPS EAD will not make out of status. We are doing the same. I am in F-1 my wife is in F-2. I am maintaining F-1 and we both are working using TPS EAD. But recently, she applied F-2 to F1 and it got approved. Contact with your DSO.