If you pay attention after completing the quest, and don't just run off, Staffron has a conversation with his "lost love" - his wife arrives in ghost form, and cannot be targeted, though she does emote if you click on her.
Conversation:
Annalise Lerent says: Staffron...
Apothecary Staffron Lerent says: Annalise? Is that you?
Annalise Lerent says: My dear Staffron, have you forgotten what it is to love? The love that we once shared?
Apothecary Staffron Lerent says: Have I forgotten? Of course I have... I have forgotten about love, happiness... of life itself.
Apothecary Staffron Lerent says: But I do know this - love makes the heart and body weak. It can be exploited. Without your love, I have only my work, Annalise.
Annalise Lerent says: But of course I love you, Staffron. And it pains me to see you suffer so.
Annalise Lerent says: I pledge my love to you forever. Death cannot erase that, even as I am sure that you still remember your love for me.
Annalise Lerent says: And if you do not, then I am truly lost.
Apothecary Staffron Lerent says: How could you love me, Annalise? Look at me. I am not the man you once knew.
Apothecary Staffron Lerent says: Annalise? Annalise! No, don't leave me!
Apothecary Staffron Lerent says: Annalise... You're right. I-I can't do this. I must find another way.
Apothecary Staffron Lerent says: You there. You're welcome to take the contents of my cauldron. It was to be the second stage of my plan - amorous clothing.