Your wife isn't wrong. Especially if the pictures are taken with a camera phone that logs GPS locations like an Iphone.(yours aren't, but just as a warning) A quick EXIF data extraction could reveal a general location, and crossed over to an image search like TinEye, could lead to finding her myspace or facebook or whatever.
There are freaks on the interwebs, and it's better to be safe than sorry.
I hate to say it, but you know deep in your heart... "the wife is always right"
