The day continues with Larry not really interested in questioning his good fortune and Sonja getting surer she knows why she keeps reforming here, and even surer that she does not want to tell Larry her theory. [She deflects his few casual speculations on the point without trouble.] There are just so many ways that could go wrong. Even assuming he didn't insist on answers [which Sonja is not about to give] to why she didn't have scads of other clothing as all women do, he might try something like keeping her prisoner.
Not that this would be all that terrible. He is a nice "jailer" and she has been enjoying her "cell" in all respects. But she does have a live she wants to live. She can't do that sliding into Larry's belly all day. No, she has to find a way to escape and she can't tell Larry her plan.

Her resolve is strengthened when she wakes from her latest digestion to find it is night and she is sleeping naked in the same bed with Larry. Her first instinct is to jump out of the bed and into her clothing, but she realizes almost immediately finding them in the dark is about impossible. A second later comes the question of just what can she do in the dark and where else can she sleep? It is not long before she works out the answer.
Fortunately Larry is sleeping on his back and his mouth is nicely open. Working her way quietly above his head, she slides her hands into his mouth. This wakes Larry [or maybe just causes him to move enough to allow Sonja to realize he is awake.

"Surprise. You are getting a midnight snack." With his mouth full of Sonja's arms, Larry can't really respond, but he opens his mouth wider, which Sonja deems agreement with her ideas. She pushes more of her arms down his gullet.

As her head goes into his mouth, she can feel her breasts sliding over his face. For a moment, there is panic that she might suffocate him. That becomes anger as she imagines him talking about that being a great way to go. In either case, the solution is to push harder so her chest is off his face and into his mouth, where any stimulation can be accepted as normal, no matter how pleasant it is.
Sonja finds herself disappointed that being eaten this way means his tongue can not reach her mounds. However this does not mean she lacks erotic stimulation. Her magnificent mountains are squeezed against him and their passage into his throat causes them to swell with excitement until her nipples are perking up like trees on top of a hill. Then she sighs gently as she reaches release.
There is still plenty of her out in the cold of the room, so she resumes pushing, her torso making its way down to Larry's belly. She finds herself wishing she could turn over to allow better access to her needy center, but is resigned to not gaining more pleasure. So it is a pleasant surprise when Larry stops her progress after her hips are in his throat and delightfully proves that even so, his tongue can reach her damp desire. As he licks and caresses, her need grows until she explodes into a thousand pieces.
That leaves her in no shape to continue pushing herself inside, and so Larry starts swallowing her. Trim legs are pleasured by his lips until she is curled up in his stomach once again.

As they are wishing each other a good night's sleep, Sonja realizes she has an idea on how to get home. It will require help from Larry, but...