Technically, Larry is far from the worst person for Sonja to run into. Even ignoring the dangerous types met on various adventures, there are plenty of people she would pay to avoid. But with nearly all of these, she could just flee into the store, and there are security guards at need.
But Larry is a friend. One could even call them boyfriend and girlfriend, tho Larry is a great deal more in favor of that idea than Sonja [much less Jason] is. She can't flee. She can't even tell him to go away. She has to be civil, even if she doesn't have to be friendly. It doesn't help that she feels guilty she took advantage of Larry. She is sorry she did it, and she can tell herself she didn't gain anything by doing so, but she still feels she owes Larry something, which can in part be paid by not blowing him off.
And Larry knows at least one of her buttons. "Say, is that the current issue?" Larry may not be quite the comic fanatic that Jason/Sophia is, but he is close, and discussing the comic is almost as much fun as reading it. Even if Sophia is wishing Anne and the others would hurry up, she is soon quite engrossed in an animated conversation.

Which suddenly ends when Larry's stomach rumbles. While Sophia is shocked, Larry too looks a bit surprised "Say, it has been awhile. Would you mind?"

Being changed into a lass gives Sophia quite a few feminine skills, but she has still never been eaten before. Nor does she know how to say "no" or "wait" or how to do anything except stand there trying to figure out how to avoid this. A girl just doesn't casually reject being eaten, and even as a pseudo girl, Sophia is subject to the same urges that rule all other women. She tries to stammer out something, anything, but she is out of time long before she gets any ideas.
Larry's mouth slips over her head, pretty much negating any chance to say anything. Technically fists and kicks would deliver the message, but even assuming she got out, she would have to explain...a lot of things she doesn't want or dare to explain. And Larry is not giving her much chance to debate the issue.
Like all ladies sweaters, Sophia's stretches to easily slide off her shoulders, exposing tender shoulders to Larry's lips [and in this case, incidentally holding her arms too tight to do anything about her consumption.] Her bra is quickly loosened, and then removed as Larry starts to taste her magnificent mounds. Sophia is furious at this, and then by his pausing to lick her breasts, and even more furious when she realizes she is enjoying his attentions.
There is, however, nothing she can do. Furious or eager, she must just endure what comes, even if she is not sure what she fears and what she hopes for. [They might be the same.] What comes does require quite a bit of enduring all right, tho not exactly suffering. Larry's tongue is exciting her. Her breasts are becoming inflamed, and when he touches her nipples they become as hard as nails, very sensitive nails... She tries to maintain control, but suddenly she is exploding into a million pieces. Her knees buckle and Larry is all that is holding her up.
Helpless, she can only ...well enjoy actually... as Larry consumes her torso. The feeling of his pulling down her pants creates a panic. The gag of a naked ass sticking out of a lad's mouth as he showed everybody his catch seems a lot less funny when it might be her rear in public view. There is only relief as her hips slide out of public view.
Very temporary relief followed by temporary shock. Larry's tongue is again active, caressing her damp need. Which seems to be the correct term. Almost immediately she climaxes again. She hadn't realized how much his lips going over every inch of her sensitive skin was affecting her. And Larry is not finished as his tongue licks caresses and probes her most sensitive area until she must yield to her joy again.
Finally Larry resumes his meal. Firm thighs and trim calves vanish into his maw, as do her feet once he gets her shoes off. Feeling Sophia roll into a ball of nutritious flesh, he rubs his belly and announces "You really tasted great."