The original ML of the book became bisexual or "gay" as they put it. Upon being injected by a drug, the MC took the still half-filled injection and injected the drug on the original ML before leaving and locking the room that contains only the original ML and his two workers. And let's just say they hit it off and original ML started questioning his sexual orientation.

Although MC and her ML are of similar age, she is technically adopted by ML's grandma, and thus is considered as the grandma's adopted daughter and thus ML's non-biological aunt.

There are characters that laugh at MC for being put a green hat by the original ML and being seen with men. This is I think is done intentional to highlight how harsh reality is as the author also have characters supporting the MC with her wild behavior and even bootlicking her beauty.

There's a kid around 5 years old that can talk and act properly like an adult. What more other stuff?

I mean, just look how many chapters it has. The story kept adding arcs that are not really important to the plotline. I think that the moment you reach around 100 or before 1k how the story will go is already clear especially since before it went 1k the original ML is already considered a hidden criminal with MC and ML spending their years happily with their 2nd child.

Zhizhi sneered. "God has spread wisdom to the world, but you are the only one holding an umbrella. What a f*cking idiot!"

It's really MC's biological child, I forgot the details but it seems she keep switching with the original owner regardless of timeline.