I think that Alex may feel betrayed by CBK for lying and kidnapping her... I would think to hear that news would make her angry "why did you do this to me" kinda thing.. Even if he has raised her from a baby...


Though I guess we really don't know what kind of relationship CBK has with Alex either, she seems extreamly rebellous towards him..

__________________
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.