Scene from an RP I'm in. I play Bob and my friend
plays Ernie, a man Judith used to date before she met and married Robert. When Judith became a famous actress and a Dame, Ernie became obsessed with winning her back. He views her as a prize and nothing more.
Ernie is an abusive, controlling man who has terrorized the Terwilliger family by kidnapping Judith and Robert's children, first Cecil at age 5, and now Bob at age 18. He hates Robert with a passion for "stealing" Judith from him and takes his loathing out on Bob for looking and sounding so much like his father (and for being named after him too).
Here Ernie is contemplating cutting off a lock of Bob's hair to send to Judith as proof that he has her son. Or perhaps he just wants to torture Bob by butchering his beautiful hair.