Yea I believe your right... Jack is so easily presuaded by a pretty face.. What was the brand they put on her anyone get a good look.. Just incase it was some small clue into the others... Usually if your going to mark someone for what wrong they have done there is meaning in the mark itself..

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Please don't give up, Des. Because all we really need to survive is one person who truly loves us. And you have her. I will wait for
you. Always. I love you, Pen

DESMOND: I love you, Penny. I've always loved you. I'm so sorry. I love you!
PENNY: I love you too.
DESMOND: I don't know where I am, but--
PENNY: I'll find you, Des--
DESMOND: --I promise--
PENNY: --no matter what--
DESMOND: --I'll come back to you--
PENNY: --I won't give up--
BOTH: I promise. I love you.