Grim Alternatives
Hermione thought of a hundred reasons to say no but she also thought of a million reasons to say yes.
Two that sprang to mind were her alternatives: Draco or Lucius.
Snape looked extremely grim and martyred.
Hermione wondered if it would have been a better idea to have Dumbledore offer.
She found herself saying 'yes' anyway. Snape would at least keep her safe.
Wouldn't he?
"A wise decision, Hermione."
"I think you'll find, Albus, there was no decision involved." Snape added, emphasizing that he was just as displeased with his forced 'decision.'
"Even so… thank you Professor." Hermione whispered.