Stop him in whatever way you can think of!

In utter horror, you watch on as your father attempts wriggling his massive appendage into your snug body. In the very last second, you finally pull yourself together enough to tense up -- completely! You use every muscle you can feel in that general area, your thighs, your pelvis, even the ones inside your pussy even if you've never used them before!

You clench, you squeeze, you tighten yourself up to the best of your abilities, but... after another firm thrust and a displeased grunt, you release a sigh of relief. He still hadn't managed to enter you, and he's quick to point it out himself! "If you don't start relaxing, you're gonna keep your virginity after all." Good! That's the whole point of why you're tightening up in the first place! It's not like you could speak up, or even struggle! "Hold on, I have an idea," he points out as he gets up, still completely naked, and leaves the room. Stupid handcuffs, otherwise this would be the perfect chance to run off.

What did he have in mind? If he's going to try and use a toy on you, it should be easy to just continue tightening up. Lube might be an issue, but even then, you were slowly getting a hang of how to use the muscles hidden away inside your vag.

A minute passed before your father returned again, and you weren't quite able to turn and shift around enough to get a look at what he brought. He got back on the bed, and spread the cheeks of your bum wide open to reveal your subtle cunt once again. This time, he ran a fingertip along the length of your slit before pushing inside for a short moment, and then pulling back again. He repeated that process a few times before pausing and leaning forward to place something on the nightstand by your side. Confused as you were, you didn't hesitate getting a better look -- a small tube of cream? Lube? You narrow your eyes to read the small letters. 'Muscle relaxant'? So it's not lube? Why the hell would he... the wheels in your head start turning, and you begin to realize what he was up to. Crap! Of course! He was more than twice your age, this probably wasn't the first time that a girl was too nervous to be an easy fuck for him. Simplest solution for the simplest problems...

He slipped his finger back into your twat and began spreading the numbing lotion all around within you, coating your insides and letting it be absorbed. Each time you attempted to squeeze down hard and prevent him from continuing, you felt less and less control over how tight you could make yourself. It didn't take long until his fingers met absolutely zero resistance anymore... your pussy was ready.

"There! Isn't that just so much better?" He casually slipped a second, and a third finger inside you with ease. Your previous tightness was all but eliminated! It didn't even feel reassuring that it's only temporary, and that the muscle relaxant would fade away soon enough. Having sex even once could already be enough to doom you for good! Did you seriously manage to avoid sex for an entire day, just to have your cherry popped like this? Hours before changing back?

You open your mouth to protest once more, but not a single word escapes your pouting lips. For all he knew, you were just another girl who was nervous about having a very special first time...