Lost fic: MCU Stucky + Peter Parker One-Shot(?) (Knifeplay, Dead Dove)

Looking for a single-chapter Stucky fic I read on AO3 pre‑2023.

Key details:

Steve is a masochist, Bucky a sadist

Winter Soldier trigger words used; Bucky slips into Soldier mindset

Bucky pins, chokes, and cuts Steve with a knife (bloodplay)(knife play)

Adult Peter Parker sits in a chair watching, disturbed but intrigued

Steve calls Bucky “Soldier” or “Asset”

Private bedroom, no other Avengers

Darkfic / Dead Dove tone — very mature content

If you recognize this fic, please DM or reply — would love the title, author, or archived link!