You Girlfriend cheated with all your friends at the house party, one of them even recorded the whole thing on his phone, she plays the video of her getting fucked as she describes how great it felt to have your best friends use her pussy and mouth, she names each one of your friends as you watch through the video, finishing with a pussy full of cum and a jizz splattered face. This is why she's so happy she has a cuckold bitch like you for a boyfriend