She didn't know what caused Cho's increase in enthusiasm but Ginny responded immediately. Moaning loudly, she spread her legs a little wider so Cho's hand wouldn't be impeding as she stroked her.
"Oh, what couple is that?" Ginny teased the Head Girl.
Hearing the idea, Ginny nodded to both Cho and Molly. "Sounds good to me." Selecting a strap on with a larger phallus, she groaned as she pulled away from Cho's hand to don it.