Is it just me, or does it seem like she is just discovering the joys of masturbation?

Looks like it to me as well. Now all we need is someone willing to translate this and the other one.

I do believe her dialogue is something to the lines that she can't stop touching herself since it feels so good. That she's about to come... And then the last box is something like, "To do that right now would be such a waste! ...Oh yeah!" As in, "Of course, I remembered something!" or "I had an idea!"

My Japanese isn't flawless, though. I'm probably missing the mark somewhere.