His command (and it most certainly felt like a command) brought forth a helpless little whimper from Luna's lips. "Yes, daddy," she told him breathlessly, more than happy to oblige. Luna watched him as she brought her hand to her mouth, messily licking her fingers. (Not that she really thought she was going to need the extra wetness. But if nothing else, Luna liked the moment of having something in her mouth, even if it was her own fingers.)
Luna's fingers found her clit and started moving over it, drawing a moan from herself that was half for his benefit and half because she couldn't help it. The way she felt her muscles tightening around him were completely unintentional though.