As a woman and a pilot, I think I'm better qualified to answer this than any of you so far....
As someone said earlier, why don't you ask her? Women LIKE to talk about their feelings, strange as it may seem to some of you.
She is probably very articulate and will welcome the chance to tell you if she's simply indifferent to seeing boring old runway lights, actually resents the expense despite earlier discussion, thinks it's OK but wishes you wouldn't go on about it quite so much, or even...would quite like to have a go herself, but is desperately suppressing that as you can't possibly afford two pilots in the family (that does happen, trust me on this).
IMHO, speculation is a bit of a waste of time. You've been together ten years; can't you talk to each other?