Not what I said, and quite unrelated.[1] Moreover, it is not what you said, even if that's what you meant. You said:
> She went to the time and trouble to pick out an umbrella especially for you, and she did it because this is clearly not the first time so it makes sense for there to be a spare umbrella.
These are significant assumptions to make. Jumping to conclusions like that will lead to relationship problems.
Of course, I could go on and talk about how the behavior could be problematic even if the assumptions are true, but it depends on the particulars of the two people involved. Certainly, if the assumption is true, the behavior is not necessarily a positive one. Intentions matter. As do outcomes. Don't ignore the latter.
[1] And yes, that could trivially lead to relationship problems, and could also trivially lead to relationship bliss, given how generic your comment is.
Good grief. No, it will lead to a moment of amused bonding over the burgeoning umbrella collection you now share, and a perpetual anniversary in my calendar labelled "New umbrella day".
The point I'm making, and shall reiterate, is that maintenance of social relationships is utterly dissimilar to how we manage organisations.
Only for those carrying the controlling/abusive danger flag.