Wayment... I got lost. What happened with the cards?

The cards was given to the child that reported his mother about Sky 'stealing one of his own' So Sky's mother gave it to him.

How did she frame Starry (forgot his name)

She lied about buying another set of cards that sky got in trouble to. Instead she took the cards that Starry showed her at the bottom of the trash bin and gave it to the boy at school.