You began walking deeper inside, passing through the back of the stomach and into Jennifer's intestines. Or at least, that's what you assumed. While it still looks like a creature's innards, they look far larger than you anticipated, and more... winding. "Why are there so many different pathways in your intestines? I thought it was just a winding path to your, um..."
A clicky giggle resounded around you. "You'll find I'm not like most whales," Jennifer answers, "Though I'm sure you figured that out by now. Why should I limit you to merely my digestive tract?"
"I see... Then where can I go?"
"Anywhere."
"Anywhere?"
"Anywhere!" Jennifer repeats. "Though since that might be a bit too open, I can give you some suggestions on where to start if you'd like."
"Yes, please."
"Alright. First you can head up into my melon, up in my forehead, to check out my echolocation, eyes, brain, anything up there." A few of the fleshy passageways glowed brighter as she spoke, apparently ones that would give shorter routes to her suggested stops. "You can wander about in my midsection, climb into my dorsal fin, partake in my milk, lounge in my heart—"
"In your heart?"
"It's large enough, don't worry. And you can head to my tail end, to explore my womb or play around in my tail flukes!"
"I can fit inside those?" Even on the outside, Jennifer's tail looked far too thin for anything to be inside it. Then again, her stomach was far more cavernous than it had any right to be, so who knows.
"Like I said, I'm not like most whales." Even though the world didn't shift, you could just tell Jennifer was twirling playfully around you. "So, my new friend, where would you like to go first?"