My husband and children suprised me with my Kindle for Mother's Day.....I love it, he drools over it. Well, I thought I would suprise him with a Kindle for Fathers Day. If I order it under my account, can we share books?? How does it work if I one click from my Kindle, does it just show up on my Kindle? or both? If I purchase at Amazons site, does it show up on both? or just one?