I think that a better choice than "silently" would be "tacitly."


Quote:
From Merriam-Webster: tacit

1 : expressed or carried on without words or speech <the blush was a tacit answer — Bram Stoker> 2 : implied or indicated (as by an act or by silence) but not actually expressed <tacit consent> <tacit admission of guilt>
— tac·it·ly adverb
— tac·it·ness noun