Although Rachel had a little difficulty, since her body was twitching wildly and her breath was coming in rapid pants, she managed to hold on long enough to watch Luna and be ready for any signs of what the other girl might desire in a partner.  "Good...good girl," Rachel managed in throaty whispers, scratching behind Luna's ear with a practically shivering hand.  "I'm gonna...gonna cum.  You gonna...?"  She hissed in a breath as her body shook.  "You gonna drink it all for me?  You gonna enjoy every last drop?"  She could barely talk, but it didn't matter.  She had to hold out long enough for Luna to have at least some satisfaction, unless Luna wanted a proper time later.  Rachel didn't honestly know how to satisfy a werewolf.