"Maybe I should." Sara said and leaned in to bite Daphne's lower lip sensuously, tugging at it a bit and sucking it as she began moving her fingers a bit faster, drawing circles with adding pressure on her clit.
Once she was satisfied with her work on Dapne's lip, leaving it red and just a little swollen, but not more than an intense makeout session wouldn't do, She brought her lips to whisper menacingly in her fellow Slytherin's ear. "I want you on your knees, between my legs, your mouth on me..." She didn't expect that Daphne had ever done anything like that before, but there was a first for everything and, if need be, she would use a bit of...coercing.