Matchmaker Si was a good person; as long as he was paid, he didn't mind playing his role as a matchmaker. He wouldn't care about whether the other party was involved in a rumor or not as long as they didn't commit a crime or arson. As for Yu Dong and Fang Chi, everyone knew that Yu Dong was a victim in this case. Someone has deliberately caused trouble for her to push Fang Chi into her household and create turmoil in her family.
As for who this person was, everyone in the village had a silent understanding. One person despised Yu Dong the most in the entire village and couldn't stand to see her do well, Qiu Bai! But because Qiu Bai was like the little diva of the village, being the prettiest and the only mer who gave birth to a proper 'man', he was revered by all. So, no one dared to say it was him outright.
In the case of Yu-Cheng, who was studying to become an official and succeeded. Then who knows how Qiu Bai might retaliate against them?
I know that the three husbands are grilling Yu Dong a lot but that's because they are scared of losing her , they were her responsibility that she has to unwillingly take on( according to them) while Fang Chi os a responsibility that Yu Dong is willing to take , amd they are quite insecure when it comes to their many things , Fang Chi is a virgin unlike them , he can be considered as Yu Dong's official husband , becauae he is marrying the real deal - so keep up with them a bit they will come around