It's obvious she's worried about "something else" for two reasons. She doesn't want any other girl getting into his pants, and she trusts him to be capable enough to handle that situation alone anyway.
Yeah, Oakley is enough help. Evans and Oakley are always enough.
That's a crowd.
There's a suspicious lack of actually showing Miss Laura.
They're pretty fast to get out of the building and to the front side after being detected but before the shooting starts.
Considering how much the narrator usually spells things out, there's quite a lot of subtext and indirect storytelling in this chapter. I mean, Evans doesn't even appear despite being the protagonist of the chapter, and we still understand pretty much everything anyway.