Heidi laughed at Lavender's comeback, but had to admit that it was a pretty hot idea, especially as she watched that nice arse.
Moving to Lavender, Heidi caressed the girl's arse softly, chewing her lip and knowing she shouldn't. Then, with no warning for Lavender, she gave the girl a fairly hard spank. "Bad girl." she purred.
"Your girlfriend? You mean Fleur?" Heidi remembered, having completely forgotten about her and Lavender and letting it slip that she knew. "She does have a nice arse. Keeps me entertained during class..."
"It's alright." Heidi smiled softly. "And if we are both ever single...I would have taken the offer in a heartbeat."