Cuckold Fantasy: Girlfriend Watches Her BF Fuck Her Sister

He came to watch a movie with his girlfriend and her sister. My girlfriend’s sister is very tired.… and when the girlfriend steps out, he starts kissing the sleepy girl. She wakes up, joins in — and just as she’s about to suck his cock, the girlfriend walks in. But instead of stopping it, she sits next to them and starts masturbating. The sister my girlfriend takes him in her mouth, then in her virgin pussy — while the girlfriend watches and moans. They all cum together.