Molly seemed to be waiting for an explanation and Ginny was trying hard to come up with one, but she was barely recovered from the thing she was trying to explain and her brain wasn't working right just yet. The nudge from Neville sort of snapped her out of it and she found her power of speech again.
"I---Uhm. I-I thought you were taking care of Fabien." She managed to stammer out, though that did little to answer her mother's question.
"Never mind where I've been or what I've been doing. I would like you to please explain what you have been doing, young lady. And Neville--I assume that's Neville--" She gestured to the lump on the bed. "While I'm glad you and your parents have made it back safely, I don't appreciate your visiting with my daughter's bed. Both of you make yourselves decent and we will discuss this downstairs."