Okay, now. Stop. Don't panic. You can handle this. You're only staring down a mammoth the size of a small city. A strikingly well-proportioned mammoth, but a mammoth nonetheless. There was no time to try to make sense of the situation. Literally not one part of it did. So just stop.
Breathe.
Inhale.
Exhale.
Now figure out what comes next. First off, positioning.
You stare up at your bed mate, looking past her size and more at what was directly in front of you and what you could possibly do to get her attention. What you noticed taking up most of your view was her colossal ass. Laying on her side, you had a perfectly clear view of each cheek, right stacked on top of left. Gravity fought to bring it down, but there was a notable...pertness that let you gaze deep between then, despite what must be flab under her thin fur. At least, it let you gaze until that particular abyss was eclipsed and fell into darkness. You swallowed, but through the terror and amazement, found yourself biting your lower lip. Beyond that, you saw her gargantuan legs, folded at the knee, and presumably somewhere beyond the shapely curve, a back. You weren't exactly being presented with many options here.
You could hike around her ass and try to scale her back, but if at any point during the trek or the ensuing climb she rolled over, you would be flattened instantaneously. You didn't relish the thought. You could try to climb her leg to get on top of her, but the leap from one leg to the other would be tricky at best, impossible if she moved even a little. What you were left with was a much more...intimate path. If you climbed at just the right point, you would be safe from back-rolling, and have a sure-fire way to the top. Where you went from there? Well, you'd figure that out when you survived that far.
With your shred of a plan, you started across the bedsheets, freezing every time the mammoth woman so much as snored, which was often and loudly. It wasn't a short journey, but without incident, you find yourself standing at the base of her left ass cheek. The curve extends far behind you. It will be a difficult climb, and not even straight up until you can scale half of this particular ass half, but you don't have much choice. You take hold of her hair and begin to climb.
It's an arduous journey, and slow-going. Luckily, thanks to her wiry coat, every time your arms feel like they're going to give out, you can bury yourself in her fair, and suspend yourself while you rest. You're climbing straight, or as straight as you can manage. If you've planned your position right, you'll be crossing a dangerous threshold halfway through your climb. You had no chance climbing across the enormous elephant pussy, and wouldn't want to take the risk even if you thought you could climb it without unwittingly slipping inside. On the other side was a darker, smellier, firmer crossing, but one far, far deeper in the mammoth's crack, somewhere you didn't even want to think about getting trapped. No, you were headed straight for her taint, the path of least resistance, and where you would hope to god she wasn't too sensitive.
You couldn't take the time to worry about the potential risks. It was your only option. You would climb quickly and hope for the best. That was all. But it didn't inspire confidence as you felt her hair lightening and spotted your mid-way point ahead. Getting as close as you dare, you take a moment and ready for this part. Breathe.
You take a deep breath and are met with the mixing of the mammoth's (relatively clean) ass and the almost moist scent of her damp womanhood. You shudder, take a second to center yourself, and quickly begin to ascend.
Of course, your climb is not uninterrupted. At the near dead center point, you feel your living mountain begin to stir, then roll. The path ahead rolls to the side. You brace yourself and briefly congratulate yourself for not opting for her back.
To the mammoth, it's a simple roll on her back. Her cheeks jiggle a little, as they're prone to doing, but nothing more. To you, the roll comes with incredible speed and the impact feels like an earthquake. You hold on for dear life and hope what comes next favors you.