Fanfiction.net also might have some Sasuke gay lemon fanfiction. However, their content policies are a bit stricter compared to AO3, so you may not find as much of the more 'edgy' content. You'll have to dig around a bit in the Sasuke - centered categories.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfictions including Sasuke - related ones. But remember to use the search filters properly to find what you're looking for.
Some smaller, niche fanfiction communities or forums dedicated to the Naruto fandom could also be a source. But be cautious as the quality and legality of the content can vary. Also, always respect the rules of these communities and the rights of the original creators.
A practical answer is Chapter 101, because it turns the idea into a concrete scene. The chapter opens with Jiang Li walked over to the slope where the two had fallen down., adds pressure through So how did Uncle Zhao conceive such a son?, and ends on If you encounter any trouble in the future, you.
Chapter 94 is the strongest chapter-level answer because it starts from Jiang Li really has some skills, being able to figure that out." "Can the... and follows through on Brother is going to dress you up; look how pretty this outfit is."....
A practical answer is Chapter 115, because it turns the idea into a concrete scene. The chapter opens with Jiang Yan was woken by a loud crowing noise., adds pressure through Looking back now, the rebelliousness and obstinacy in his bones were..., and ends on [Pure bystander, wasn't Jiang Yan.
Look to Chapter 116 for the clearest answer. It begins with But before the audience in the live room had time to continue brewing the..., keeps building through Jiang Yan quickly entered the room, and a few minutes later, he dashed out..., and lands on Their old Jiang family never had such twisted.
Look to Chapter 109 for the clearest answer. It begins with And another thing," Jiang Li said, taking out a tissue to wipe her lips,..., keeps building through The next time we have a meal, don't try to chat with me unless you're fine..., and lands on [You're indeed more likable than me, the type.
A practical answer is Chapter 82, because it turns the idea into a concrete scene. The chapter opens with Jiang Li gave her a fleeting glance., adds pressure through Therefore, he immediately decided to add another task on the spot to gain..., and ends on And so, aside from Wen Jiaojiao, the.
Look to Chapter 89 for the clearest answer. It begins with Director Sun took a step back, "What's the rush?, keeps building through It's true about the go-kart costing one point, but this time we're using..., and lands on If anyone should be mocking her, it should be me.] Wen Jiaojiao stood to....
The best chapter pointer here is Chapter 95, "The Problem Lies with Your Boyfriend". It opens with Hearing others praise her daughter, Aunt Lin was smiling so wide she... and closes on Your boyfriend must have studied in another province, if I'm not mistaken,....
Chapter 118 is the strongest chapter-level answer because it starts from At 8 in the morning, several guests appeared on time next to the... and follows through on Hearing this, both Jiang Yan and Shu Yan started to complain as well..
Look to Chapter 57 for the clearest answer. It begins with Lu Xingchao's numerous fans were stunned., keeps building through Holy shit, what's up with God L?, and lands on I'm saying, big bro, can you at least reply to me?.