Li Shimin killed Yang Fei's husband and her son. Why did she marry Li Shimin willingly?

The fourth son, Li Yuanji's wife Yang, should be mentioned here. Li Yuanji supported Li, a reclusive prince, and chose to assassinate him, but Li stopped him (Li wanted to dig his own grave). Later, Li Shimin launched the Xuanwu Gate incident, killing Li and Li Yuanji, and killing five sons of Li Yuanji, leaving only six daughters of Li Yuanji. Li Shimin also occupied Yang Fei.

Is Fei Yang really willing? We can make a simple inference. According to historical records, after the death of the grandson of the former queen of Li Shimin, Li Shimin once intended to make Yang Fei the new queen. However, due to the suggestion, "Your Majesty, just like Chen Sheng in history, she is cheap and immoral, so you can't let her be the queen", the idea of being the queen was dismissed.

According to historical records, it can be seen that after Yang Fei followed Li Shimin, he should have served Li Shimin well, otherwise Li Shimin would not have made her the queen. But why is Yang Fei willing? Actually, it's not for her to decide. In history, winners and losers, as we all know, Li Shimin killed several brothers and Li Yuanji's five sons, which is already in power, while Li Shimin took a fancy to Yang Fei. If she doesn't obey, she will die or is already dead.

After Yang Fei followed Li Shimin, she also knew that if she didn't serve Li Shimin well, and because her husband and son were killed by Li Shimin, which made Li Shimin look ugly, there would be no good fruit to eat, so she served Li Shimin well. I don't know whether there are other reasons behind this willingness.