Ah I was wondering how you were going to fit in something for the 7th day. Sounds like their both going to have a very early start to complete their time together. Although possibly their starting to enjoy this too much to stop at this point?
That's both a pretty new combination and an interesting way to play into it. In the unlikely event Hermione would get such an urge I could see her coming up with an idea like this to obtain what she wants with minimal resulting problems - hopefully anyway.