Help with gift ideas!

Hello! I am putting together a valentines gift basket for my Dark Romance loving fiancé, and would love some extra help coming up with ideas!

Her favorite novels are the Cat and Mouse duet, as they are the ones that got her started into the genre. She has also recently read Nocticadia, Her Soul to Take and really enjoyed it and its sequel. Her list is pretty expansive by this point, I don’t know all of them! Currently, she is reading Butcher and Blackbird.

So far, I have:

• Special physical copy of Haunting Adeline

• Cameo from her favorite audiobook narrator

• Toy gun (IYKYK)

• typical valentines things, flowers/chocolates/ etc.

I would love to get her in-jokes/references from any popular books or tropes, or new books!

As a note, I have not read any of the novels, so I only know what she tells me from them. Any help would be appreciated!