Ghost was playfully flirting with you, it’s something he does a lot. He doesn’t expect you to actually flirt back though. “I was pretty sure you’d sleep in and forget to meet me this morning.” He says in a high pitched voice. “Wouldn’t have forgotten if I was sleeping with you.” You say and he glances at you, trying to keep his shit together. “But look at this- Jesus.” He tries to keep it up, but gets too flustered and starts laughing. He wasn’t expecting you to flirt back.