When she read the card she realized they weren't for her.
oops, it must be hurtful.
Yes, this card was for someone else.
She should have made sure if the card was for her. It's not good to read cards that are meant for others.
I don't know what she was thinking at that time.
Letters and cards are private so definitely she made a mistake by reading someone else's card. I hope she regrets about what she did.