Why Is He Crying After He Is Reborn as His Ex-Husband at the End of the World?

In the fifth year of the apocalypse, I died at the mouth of a zombie. Before he died, my disabled husband said with his last breath: "The biggest regret in this life is not being able to break through the secular world with my 'sister'." The "sister" he refers to is a poor student who I have supported for six years and is not related by blood. And I am his wife who has been married to a matchmaker, has given birth to his children, and has worked hard to support the family for five years in the last days. Reborn eight years ago, everything has not yet begun. I looked at the message from my "sister" on my phone: "Sister Yaoyao, my brother wants to treat you to dinner tonight, you must come~" I smiled and typed the reply: "Okay, I will definitely go." Then, he packaged up all the funding details and ambiguous chat records of the "sister" over the past six years and sent them to the school forum and all her suitors. In this life, I want to watch this pair of "true love" seek mercy and gain mercy amidst everyone's rejection. And I want to hoard tens of billions of supplies to build the last ark of mankind. But why did the man who silently guarded me until death in my previous life appear earlier in this life? He looked at the mountains of supplies I had hoarded with a deep look in his eyes: "Xie Yao, are you... Back too?"