So!

For the guns, I figured that Morgan watches the other members of the Group carefully (either out of habit or because she has a mother hen attitude; probably a little of both), and collecting firearms cases from TSA is a very specific series of things you must do, which are pretty easy to keep track of. Since [i]removing[/i] a firearm from a TSA-approved case is also a fairly "showy" activity (the cases are typically hard-sided plastic or metal cases with large covers or hinged lids and must have separate shackled key or combination locks), she would have known by looking that Manny and Kennedy had both collected their firearms, and that both of them had made said firearms available (Manny by holstering his at the small of his back, Kennedy by putting hers in a purse or bag). 

(I travel with a firearm on an irregular basis)

For the intention, take your pick: Narrative lease, prior experience with Manny's attitudes, Naril has had an unbelievably bad couple of weeks, succubus' intuition, sunspots.

:3