This time there's no outright response: it's entirely possible that she's disappeared to find an alternate way inside, true to her word.

...But when is Sombra ever sincere?

A few beats later, the sounds of the city outside (still brimming with eager families, bustling cars and rushing omnics, late to festivities and forged company) give way to the faintest, politest little knock.

Happy Christmas, Widowmaker.