It's not right to not share with others.
Jenna is baking a batch of cookies and her brother just asked for one when they're done.
Jenna wants to make sure she gets plenty of cookies.
Jenna doubles the size of the cookie batch she's making.
Jenna hoards all the cookies for herself and tells her brother to go away.
Both Jenna and her brother can have plenty of cookies.
Jenna's brother cries, making it hard for her to enjoy her cookies.