It's rude to date your sister's ex.
Maya just broke up with her boyfriend and her sister Mia heard about it.
Mia wants to decide if she should ask out Maya's ex.
Mia decides that asking her ex out would be wrong, so she doesn't do it.
Mia asks out Maya's ex on a date with her instead.
Maya calms down and eventually gets over her breakup.
Maya's ex says no and is quite shocked that Mia would do that to her sister.