If you're going to take them with you, make sure you've sorted out LOTS of stuff for them to do. The vast majority of women don't like playing second fiddle to anything, so if she's the type who's going to start giving you grief after a couple of days I'd think very carefully about the negative impact her presence will have on your training.
Fortunately mine as about as laid back as they come. We spent most of my post-PPL hours doing long weekends in interesting parts of the country, shoe-horning the Cardinal in and out of 400m farm strips etc... She's sat in the back during many a training session aswell, although wasn't so keen on the partial panel recovery from unusual attitudes.
As with everything, some are great, some are a pain in the ass, and most are somewhere in between. Give some thought to the planning and I don't see why it couldn't work out just fine.