Usb cable to usb cable conector?

[the dane]

Hi, If I was to purchase a usb 2 usb conector! would I be able to move photos from my camera to my smart phone?
Reason I ask, just came back from a weekend in Melbourne, and every good photo I took my wife wanted a photo taken with her phone to send to her friends! (so it would be better at the end of the day to find my best photos, send them to her camera, then txt them to her friends) It sounds like it should be straight forward ??????? or do I need an app??? or it cant be done????
thanks