I think it’s just because of Evelyn’s shyness in front of the camera.
Yan was used to Flora being naked most of the day and being able and willing to pose well in front of the cameras. That alone brings higher viewership.
Evelyn, on the other hand, hides as best she can and only wants sex in the dark and under the covers, if at all. Yan therefore constantly tries to persuade her to have sex and Evelyn defends herself as best she can. And that’s where the fights come from.
Yan blames Evelyn for not doing enough and Evelyn blames Yan for pushing her too hard. In between she gives in and there is short sex and if Yan then wants longer, it becomes too much for her and there is another fight.
It may be that there are completely different reasons, but I think I’m pretty close to reality.
Flora kindly asked me to tell you she is just there for a short time to get some family things settled. You know New Year is coming and there are things to take care of. There won’t be anything happening with Yan