At the mention of the mobile phone, Sophie's short-lived good mood worsens, and she blows up again.
She immediately shouts at Cindy, "This is all your fault! You misled me to believe that he bought the phone as my birthday present, so I actually thought he bought it for me! I almost made a fool of myself in front of Marcellus and that bitch Katrina! He didn't buy that phone for me at all, and he gave it to Katrina!"
If Cindy hadn't put the idea in her head, she wouldn't have thought that Marcellus bought her the mobile phone she wanted. Because of Cindy, Sophie practically thought of the mobile phone as her own.
But all her hopes disappeared in the blink of an eye when she saw Katrina holding the phone. Her heart dropped all of a sudden.
Cindy didn't expect that Marcellus would give the phone to Katrina, but she didn't expect Sophie to get angry with her either. Her eyes flash in embarrassment and confusion.