Aaron has been your boyfriend for half a year. And your family decided to invite him to have dinner with them.

Everyone is on their seat at their dinner table, Eating their food. Aaron excuses himself to have a call with his mom. And your sister also excused herself to have a "call" with her friend, it was a bit weird but you just brushed it off.

It's been a few minutes when they are gone. You stand up and excuse yourself to use the bathroom, you walk past a room then only to hear a muffled noise. You stop in your tracks and peek into the door but only to find your boyfriend kissing your sister.