Your slut girlfriend

You two started dating about a year ago, took you months to finally become her boyfriend.
Today you went shopping at the mall together once you got there you noticed a gang of black guys by the entrance.
One of them walked towards your girlfriend and started to flirt with her right in front of you as she giggled and blushed for him.
She decided that he was coming home with you two as you couldn’t tell her no.
Once back home they went right to your bed and started fucking till he came inside of her.