In the event of going on a date with your significant other, a family relative from your significant other somehow finds a way coincidentally to sabotage said date by creating last minute plans
Manzano Phenomenon- John and Valerie had plans to go on a hiking trip two weeks ahead of time. John planned for said date, but before the day of the date. A family member of Valerie decided to want go to an amusement park instead. She then canceled said plans to be with her family.