"I guess,..."

"...but I've never sucked cock before!"

"Oh, nonsense, Puppy, of course you have; you've just forgotten! Let me remind you..." Saying that, she clambers atop your chest, and her cock is now right next to your face, "Go on, take it in your mouth!"

After a moments hesitation, you decide to do it, but your neck is just as unresponsive as the rest of your body, so you cannot move your head to take Mara's cock in your mouth.

"I, um... I can't." You say blushing.

"Oh come on, let go of your inhibitions and just take it!" She said irritated, and adds, "You've done it so many times before already!"

"No, it's not that," you say, "I literally can't move my head."

"Oh? Well, let me just help you then!", Says Mara and moves closer to your face, grabbing your head and adjusting her cock to your lips.