Ageing yes, I'm afraid you're in totally the wrong place to be talked out of a perfume purchase 
Seriously though, I now have a low income (hence me lurking more than posting!) but think perfume is one of the best things to spend "personal" money on. You wear it every day, it gives you pleasure (and the people around you!) and, for me at least, is central to my identity.
My mother always told me to spend as much money as I could on shoes and mattresses as you're always in one or the other. I would add to this, spectacles and perfume and tattoos - all of which I wear every day and want to have the best I can and get pleasure out of them every day.
Get the perfume!
I spend my "disposable" money on lovely perfume although I buy little decants of the £££ stuff and lots of perfume parlour stuff. Occasionally my DH secretly saves up and presents me with a £££ bottle which means all the more as I know it makes him happy to see me happy 
I think women, especially mothers, are conditioned to feel guilt all the time including spending money on "themselves". Well sod that, (if our bills are paid etc) we deserve to smell nice and be happy and have luxuries just as much as everyone else! In fact, more 
I hope you get it! Report back...