Professor McGonagall convinced Mrs. Weasley that it would be best for Ginny to stay with her brother at Grimmauld Place, so that she could start interning at the Ministry in the Department of Magical Games and Sports. She was thrilled when she got the internship, and Mrs. Weasley was so worn out after having all the kids stay with her, she gave in fairly easy- although, not without stern warnings and many threats to his health and well being if anything happened to her. Ron could be heard muttering about if for days afterwards- "Honestly! I fought in the war, for Merlin's sake! I killed horcruxes!"- but soon enough, they were climbing into the fireplace, trunks packed, pets caged, Mrs. Weasley crying and trying to rub a spot off Ron's nose- "MUM!"
Then they were off.