As I don't know the actual story, it's hard to give definite themes. But if it involves a mom, possible themes could be family, motherhood. However, the 'panties' part makes it really unclear and it could potentially be a very strange or inappropriate story, but again, this is all speculation.
Not having any details about the'moms panties pirn story', we can only make the vaguest of assumptions about possible themes. It could potentially be about love and protection if the mom in the story is trying to protect something related to her panties (although that sounds rather odd). Or it could be about loss if the panties are lost and there are consequences related to that in the story. But truly, without knowing the story, these are just baseless guesses.
A practical answer is Chapter 53, because it turns the idea into a concrete scene. The chapter opens with Night had fallen over Chixia Village, eerily void of any human sounds., adds pressure through How does she manage that?] [Now, I really think all the negative press..., and ends on Wait, did.
Look to Chapter 75 for the clearest answer. It begins with The ordinary people in the livestream were all stirred up by this scene., keeps building through [Did you see that, did you see that?, and lands on But, being a half-baked practitioner is just fine..
A practical answer is Chapter 105, because it turns the idea into a concrete scene. The chapter opens with But this did not elicit any sympathy from the woman on the phone;
A practical answer is Chapter 83, because it turns the idea into a concrete scene. The chapter opens with When they received the task, the three of them were already sharpening..., adds pressure through All of this was thanks to Jiang Li's patient guidance., and ends on Since all the guests were.
Chapter 51 is the strongest chapter-level answer because it starts from Oh, okay." After uttering two syllables indifferently, Jiang Li bent down... and follows through on If I opened a bar here, wouldn't I become a savior?" Jiang Yan was....
A practical answer is Chapter 71, because it turns the idea into a concrete scene. The chapter opens with Shu Yan curled her lips with a hint of jealousy, "When can it be my turn..., adds pressure through The sun is so intense;
Chapter 82 is the strongest chapter-level answer because it starts from Jiang Li gave her a fleeting glance. and follows through on And so, aside from Wen Jiaojiao, the remaining five set off, each....
The best chapter pointer here is Chapter 101, "Hello, My Name is Zhao Daniu". It opens with Jiang Li walked over to the slope where the two had fallen down. and closes on If you encounter any trouble in the future, you can come to me..
A practical answer is Chapter 64, because it turns the idea into a concrete scene. The chapter opens with Chixia Village lay in tranquil slumber., adds pressure through Is there really a need to put her down like this?, and ends on He'd been a host for so many years; he was used to it..
Chapter 61 is the strongest chapter-level answer because it starts from Hahahaha, oh my god, Jiang Li's mouth is even more venomous. and follows through on A cold shower is pretty normal, right?.