Hey Richard
ROFL... I read aloud to my wife your suggestion regarding our sharing cameras. "Not in this lifetime" or something to that effect, was her answer. LOL... It's like my attempts to use her computer. "No way, Pal! You mess up your computer and you won't be messing up mine!" My response, "But, Honey... but..." goes to no avail.
I "like" your idea of the wide angle zoom and eventually will probably get it as a second lens we both can share. She's not really that fussy about going out into a wider range than the 18mm afforded by either the kit or this 18-250 that we're thinking about. If she wants anything else, it would likely be a prime for low light or a macro, neither of which interest me.
So, as I see it, my future lens buying will probably be the 18-250 (two of them) and the wider zoom you suggested. Period. End of accumulation. I don't really have LBA and I don't want to get it either.
Thank you, everyone, for all the great suggestions. This group is really a "find" for anyone interested in photography. Much appreciated.