Even Skype is a risk, if you don't want anything to turn up online, as the person at the other end of the call can record their screen and sound without you knowing.
If you show the images to random members of the public, you run the risk of arrest and public exposure through the courts, even if you just ask somebody if they want to see the pictures.
If you really feel the need to share, and have your wife's permission, rather than panic about the risks, mitigate them - obscure you're wife's face (with a mask, or by editing the images), delete any part of the image that could identify your location, and remove the image's metadata.