"Yea but we choose to tell those people." He muttered. Not that he could have hid it from Hermione, Ron, McGonagall, or Severus.
"I didn't think of that." He admitted, "My thoughts were more along of the line of stringing curse words together when he showed up. He gave me a plausible reason I took advantage of it." Though she was likely right about Cass badgering them into a threesome.
Sighing he ran a hand through his hair and said, "It's more your secret you can decide. Knowing him he'll be up here before long if we don't head back down." He paused for a minute, "I didn't like lying to him."