Spell casting Sister Shrinks You Small

Marissa has been playing around with her new spell book (all her friends are doing it!) so she decides to see if she can use one of the spells to grow her boobs bigger, but no luck. Maybe she did it wrong? Before she gets a chance she is busted by her annoying little brother who is threatening to hell their Mom and Dad. Marissa goes to show him thats its just for fun by casting a shrinking spell on him and to her surprise- it worked! Now the real fun begins , what will Marissa do with her new "toy"?