Finish the Master Zhen Questline first by rejecting Nyxara and sealing her again inside the Portal. Then he'll tell you that he wants to do gardening but he doesn't have any experience on how to begin.
Go back to your home, tell Anna about it and go to the Torii Gate. Go back and forth between Temple and the Torii Gate 3 times to progress the dialogues between Anna and Master Zhen.
Wait until the next day and go to the Temple. There you will find Master Zhen giving his late wife's clothes to Anna and you'll get new scenes with the two of them.
