It's bad to do things out of spite.
Sherry is fighting with her boyfriend.
Sherry wants her boyfriend to know she is upset.
Sherry sits down and calmly explains her feelings to her boyfriend.
Sherry goes to the club and hits on random guys, sleeping with one of them.
Sherry and her boyfriend have a long talk and make a plan to make their relationship better.
Sherry is found out and her boyfriend breaks up with her.