Her familiars weren't stated to be especially good at surveillance, so their sight/hearing's equivalent to an average person, not an average person with binoculars or something. So, since you've made it able to make out details of conversation and whatnot, it's not going to be incredibly far away, regardless of what Seyrun wants to believe on the matter.

That said, it was said to keep a distance in some regard, so it being directly in front of Rasputin's car such that it could be accidentally run over wouldn't be a thing.