Why did Wang Zhige's wife open the door?

In Chasing the Murder in the White Night, Wang Zhige's wife helped Wang Zhige kill Lu Siping. His wife lured Lu Siping to the bait and then gave Wang Zhige a chance to commit a crime.

At first, I wondered why Wang Zhige's wife helped Wang Zhige. Wang Zhige was caught cheating by Lu Siping, so he wanted to get rid of Lu Siping. His wife Tang Ying didn't accuse Wang Zhige of cheating, but helped him commit a crime.

Personal feelings:

They have a good relationship. At that time, Tang Ying was pregnant, so she forgave Wang Zhige's unbearable affair, while Lv Siping was full of resentment and disgust at her husband's humiliation at that time and subsequent extortion, so she helped him get back at her husband's no longer bound and career prospects.

Wang Zhige's so-called cheating object is actually his wife. At that time, telling Lu Siping that he was an old classmate was actually a rhetoric. Perhaps it is to protect his wife's face and choose to bear it. Moreover, Wang Zhige himself is a person with serious cleanliness, and it is quite strange to go to other places with other women. In the case investigation, the police also sent many police officers to investigate Wang Zhige's so-called old classmates, and there was no result at all. Zhou Xun also said that Wang Zhige may have fooled Lu Siping. Personally, I guess Wang Zhige's wife was pregnant at that time, and then the fetus stopped developing. Maybe it's also because they were found blackmailing in the wild and influenced by external stimuli. Just a personal guess. I wonder if this situation will affect fetal development. If so, it is more likely that Wang Zhige's wife resented Lu Siping and helped her husband kill people. Even if not, when Lu Siping ran into them and the subsequent extortion, Tang Ying might choose revenge.

Even more bizarre guess is that it is Tang Ying who cheats! I only mentioned before that Lu Siping met university teachers and old classmates in the wild. This old classmate may be Tang Ying, and the university teacher is Tang Ying's classmate. Wang Zhige has a serious cleanliness addiction, and it feels a little impossible to engage in this kind of outdoor car with others. Moreover, it is said that people's watches rolled down at that time. If it's Wang Zhige, his big diamond ring is probably lost. The woman who went to the hotel later confirmed that it was Tang Ying, so how did they come into contact with each other? It is possible that Tang Ying is planning revenge, making excuses to get rid of Lv Siping's entanglement and extortion, promising something to Lv Siping, or taking the amount of Lv Siping's extortion in another way, so that Lv Siping will contact Tang Ying and go to the hotel together. Wang Zhige can see his feelings for Tang Ying from his wedding ring. He chose to forgive, or as mentioned earlier, Tang Ying was stimulated and their children could not be born, thus taking revenge on Lv Siping. From then on, he vented the resentment in the hearts of similar men and women, and then a series of things happened. After Wang Zhige was arrested, Tang Ying cried when she went to the police station to answer police questions, perhaps because she felt sorry for her husband or because she felt guilty about her husband.