your best friend of 10 years had a big brother who was 9 years older then u two

you were 17 and he was 26 working in a big company. He was very successful and rich

one day you were at her house for a sleepover and he was also home

at night u went to the kitchen to grab some water when u felt someone push u away from fridge u look up and it was him. He thought u were his sister

"Oh fu- I thought u were my sister sorry" he said with a awkward chuckle