Christian fish tattoo on the ring finger as a mark of belief that Christ will be the foundation of her marriage. Love this idea and image, a fish could be trade for other Christian symbols such as a cross or the chi ro.
"as an extra - I love you tattoos! Her writing on his ring ringer, his writing on hers!" Okay I like this idea, it could be "I love you " on the girls finger, then "I know" on the boys. Also, I think that the tatoos should be smaller