From the Mystical Moments Tarot, the Seven of Swords; from the Inner Eye Oracle, the Jack of Hearts:
People will reveal who they are if you just pay attention.
― Germany Kent
There are those who treat others like a tissue - they use them then toss them in the trash. As with the serpent girl stealing bird eggs, it's not always easy to see the scales of those in whom we place our trust. People make mistakes, but blunders are different from breaking someone's trust. Such a fracture involves betrayal and deception; the intention behind the action is completely self-serving without consideration of the other. The Jack of Hearts represents the Lover. The swan that drapes itself around his neck symbolizes devotion and loyalty. Loyalty, this Jack would tell us, is about protecting those we love. It doesn't mean we are always in agreement with our beloved, but our actions are motivated by care and concern. If that's not the case, peek under their appeal and you'll probably find scales.