Arthur Weasley in Gryffindor?

[Deb]

No: HPFGUIDX 111405

I just finished rereading GOF last night. Molly specifically tells 
Harry (when visiting before Task 3) that she was yelled at by the Fat 
Lady one night for sneaking in at 4:00 am, out walking with Arthur. 
She definitely says, "I was" not "We were" told off . . . so . . . 
she obviously came back on her own. Is that because Arthur was 
detained by Filch's predecessor, or because he was trying to sneak 
into the Ravenclaw or Hufflepuff dorm at the time?

Deb in NJ