The kettle had whistled while Hermione was showering. Apparently she'd forgotten about that. Ron went into the kitchen and prepared two cups of tea, drinking his slowly and keeping hers warm as she seemingly took forever in the shower.
It did help sober him up a bit more, and he was sitting up in bed when she returned. Reaching for her cup, he checked to make sure it was still warm, and then handed it over.
"So I'd ask if we could pretend the last two days didn't happen, but I don't think that would work, really," Ron said.